24 minutes ago, automass said:

 

How to test the battery myself! Can I use OBDEleven to do that? As an example put the car in access mode and turn everythng off. then keep an eye on the battery volt

I really think you are chasing the wrong culprit here, it has been changed now twice and has been tested, you really do need to investigate what else is going on with the electrics on your car. It would be lovely if it was something as simple as the battery but given the above and even with the Halfords link, which you and I are not happy with their performance, on this occasion I think you rule out that they have continually made a mistake with regard to your battery.

 

The common link here is that you still cling onto this thought and appear to be resisting seeking a thorough check of the car with some serious testing kits and skills by someone with the right tools. If you don't take that step, you're going to be having this problem happening time and time again, it has already been a real pain in the butt for you.

Edited 3 September, 20232 yr by Graham Butcher

1 hour ago, automass said:

 

How to test the battery myself! Can I use OBDEleven to do that? As an example put the car in access mode and turn everythng off. then keep an eye on the battery volt

You need to get a multimeter with an amp clamp. You can use an ordinary meter but I would use an amp clamp. I’m sure you can buy them for around £20-£30 from somewhere like machine mart or screwfix.

Open the bonnet

click the bonnet catch closed to fool the car that everything is closed.

turn everything off, unplug all accessories including your obd thing.

close the doors and move the car key as far away as possible 

Leave it for 30 minutes 

connect the multimeter (refer to its instructions)

check what current is being drawn. 
Someone more knowledgeable than me will tell you what is expected or even the actual spec for the car, but I would say 80 to 100 ma or more indicates a problem. If you can find someone with a similar known good car, test that to get a comparison.

 

Edited 3 September, 20232 yr by classic

1 hour ago, classic said:

You need to get a multimeter with an amp clamp. You can use an ordinary meter but I would use an amp clamp. I’m sure you can buy them for around £20-£30 from somewhere like machine mart or screwfix.

Open the bonnet

click the bonnet catch closed to fool the car that everything is closed.

turn everything off, unplug all accessories including your obd thing.

close the doors and move the car key as far away as possible 

Leave it for 30 minutes 

connect the multimeter (refer to its instructions)

check what current is being drawn. 
Someone more knowledgeable than me will tell you what is expected or even the actual spec for the car, but I would say 80 to 100 ma or more indicates a problem. If you can find someone with a similar known good car, test that to get a comparison.

 

Not quite that easy to do as you need to use a specialised clamp meter to measure DC current and there are only few on the market and tend to fairly expensive and also the various control units will continue to talk to each other I expect even when the car is not in use. You also should not use a normal digital multimeter on a car unless you actually know what you are doing. By that I don't mean that user is going to blow bits up etc, but that because digital meters have input resistances of 10M ohms and more. They are perfectly capable of giving misleading readings.

 

Edited 3 September, 20232 yr by Graham Butcher

Are you sponsored by diagnosedan Graham 😀 ?

That video is going off on a tangent testing a quite different issue, so not much use to automass.

I think automass needs to test for a parasitic draw and he asked how to do that and my explanation is what I’d do. I actually don’t think that is going to be his issue but it needs to be ruled out.

Thanks everybody for trying to help me pin pointing the problem. guys, no body mentioned about the USB Charger. Can it not cause all the problems ( in case it has come in contact with liquid when dash cam and mobile charger cables were conneted).  Today I used another spare USB charger after cleaning the 12v port with electrical contact cleaner spray and surprisingly noticed that my dash cam is not getting powered off with start-stop which was not the case with usual USB charger (which was always connected in the port).

Now with this new battery, it is working fine with start-stop. but couple of times there were start-stop error occured. Diagnostic detected cyl3 and random misfire. I know already if there is start-stop error, there must be misfire detected which is always the case in my car. after restarting the car the problem goes away and start-stop works normal.

 

Anyway, I think I'll have my car checked up with local electrician who is expert on battery, alternator, start-stop problem and so on. I know for sure there is no electrical problem in my car, but well, those two modules (accidently activated) were always bugging me. who knows if they were draining the battery as someone already suggested here.

 

following are the dignostic result underneath if anyone knows how to disable those two modules.

 

OBDeleven data log

Date: 2023-09-03 12:36

    VIN: TMBBC7NE9J0155483
    Car: Skoda Octavia
    Year: 2018
    Body type: Estate
    Engine: CZDA
    Mileage: 168519 KM

---------------------------------------------------------------
01 Engine

    System description: R4 1.4l TFS
    Software number: 04E906027HD
    Software version: 3742
    Hardware number: 04E907309BH
    Hardware version: H26
    ODX name: EV_ECM14TFS01104E906027HD
    ODX version: 001007
    Long coding: 01250032232401080000

    Trouble codes: 
        P030000 - Random/Multiple Cylinder Misfire Detected
            static
                Date: 2023-09-03 12:22:24
                Mileage: 168517 km
                Priority: 2
                Malfunction frequency counter: 1
                Unlearning counter: 255
                Engine speed: 684.50 1/min
                Normed load value: 14.9 %
                Vehicle speed: 0 km/h
                Coolant temperature: 79 °C
                Intake air temperature: 60 °C
                Ambient air pressure: 1020 mbar
                Voltage terminal 30: 12.557 V
                Dynamic environmental data: 20965011BE001313F47D35F40685F4464610D3000114B409C4
        P030300 - Cyl.3 Misfire Detected
            static
                Date: 2023-09-03 12:23:45
                Mileage: 168517 km
                Priority: 2
                Malfunction frequency counter: 1
                Unlearning counter: 255
                Engine speed: 684.50 1/min
                Normed load value: 14.9 %
                Vehicle speed: 0 km/h
                Coolant temperature: 79 °C
                Intake air temperature: 60 °C
                Ambient air pressure: 1020 mbar
                Voltage terminal 30: 12.557 V
                Dynamic environmental data: 209650F44643F40B571010039814B409C411990F3617460001432100


---------------------------------------------------------------
02 Transmission

    System description: GSG DQ200G2_M
    Software number: 0CW300041B
    Software version: 1006
    Hardware number: 0AM927769E
    Hardware version: H05
    Serial number: CU501708186136
    ODX name: EV_TCMDQ200021
    ODX version: 001001
    Long coding: 0014

    Trouble codes: 
        No trouble codes found

---------------------------------------------------------------
03 Brakes

    System description: ESC
    Software number: 5Q0614517AM
    Software version: 0312
    Hardware number: 5Q0614517AB
    Hardware version: H25
    Serial number: 62267000000730
    ODX name: EV_Brake1UDSContiMK100ESP
    ODX version: 036010
    Long coding: 24078A9124252171407B060840C6242451248402600224723021F070C002430000000012121212B8586C384E4484EE

    Trouble codes: 
        No trouble codes found

---------------------------------------------------------------
08 Air Conditioning

    System description: Climatronic
    Software number: 5E0907044AP
    Software version: 2001
    Hardware number: 5E0907044AP
    Hardware version: H04
    ODX name: EV_ACClimaBHBVW37X
    ODX version: 006146
    Long coding: 0111000400011001100500080010102A

    Trouble codes: 
        No trouble codes found

---------------------------------------------------------------
09 Central Electrics

    System description: BCM MQBAB M+
    Software number: 5Q0937084CP
    Software version: 0253
    Hardware number: 5Q0937084CF
    Hardware version: H36
    Serial number: 01001723702021
    ODX name: EV_BCMMQB
    ODX version: 018001
    Long coding: 000000000000000000000000000000000000000000000000000000000000

    Subsystems: 
        System description: WWS371 170628
        Software version: 0915
        Hardware version: 051
        Serial number: 887253F0401717901087
        Long coding: 164DDD

        System description: RLHS         
        Software version: 0105
        Hardware version: 047
        Serial number: S9Y17M08D31H21M34S36
        Long coding: 00885D

        System description: Sensor, DWA  
        Software version: 0316
        Hardware version: 005
        Serial number: 000000000ZY171431WXQ

        System description: Sirene, DWA  
        Software version: 0314
        Hardware version: 005
        Serial number: 00002856223971443259

    Trouble codes: 
        No trouble codes found

---------------------------------------------------------------
13 Adaptive Cruise Control

    System description: ACC BOSCH MQB
    Software number: 5Q0907572J
    Software version: 0654
    Hardware number: 3QF907572
    Hardware version: H10
    ODX name: EV_ACCBOSCHVW416
    ODX version: 002006
    Long coding: 3300608141FFC728949C810500400600000000000000000000

    Trouble codes: 
        No trouble codes found

---------------------------------------------------------------
15 Airbag

    System description: Airbag VW21
    Software number: 3Q0959655BH
    Software version: 0703
    Hardware number: 3Q0959655BH
    Hardware version: 006
    Serial number: 003W4PGL3JQK
    ODX name: EV_AirbaVW21TS6VW48X
    ODX version: 001014
    Long coding: 98CCC000000000005C5400CC008800000065

    Subsystems: 
        System description: SideSensor_Df
        Software version: 0887
        Hardware version: 008
        Serial number: 3570000000055099982J
        Long coding: 2D2D2D

        System description: SideSensor_Pf
        Software version: 0887
        Hardware version: 008
        Serial number: 35800000000A7794082K
        Long coding: 2D2D2D

        System description: SideSensor_Dr
        Software version: 0148
        Hardware version: 301
        Serial number: 35100BEB2D610000000O
        Long coding: 2D2D2D

        System description: SideSensor_Pr
        Software version: 0148
        Hardware version: 301
        Serial number: 35200C5B70611000000A
        Long coding: 2D2D2D

        System description: FrontSensor_D
        Software version: 0149
        Hardware version: 304
        Serial number: 3550027C7C710000000I
        Long coding: 2D2D2D

    Trouble codes: 
        No trouble codes found

---------------------------------------------------------------
16 Steering Column

    System description: Lenks.Modul
    Software number: 5Q0953521T
    Software version: 0235
    Hardware number: 5Q0953569A
    Hardware version: 075
    Serial number: 20170826500580
    ODX name: EV_SMLSVALEOMQB
    ODX version: 001015
    Long coding: 1410

    Trouble codes: 
        No trouble codes found

---------------------------------------------------------------
17 Dashboard

    System description: KOMBI
    Software number: 5E0920950F
    Software version: 0310
    Hardware number: 5E0920950F
    Hardware version: 303
    ODX name: EV_DashBoardVDDMQBAB
    ODX version: 009060
    Long coding: 27AD02082980860001887B011001000000000000

    Trouble codes: 
        No trouble codes found

---------------------------------------------------------------
19 Gateway

    System description: GW MQB High
    Software number: 3Q0907530G
    Software version: 4303
    Hardware number: 3Q0907530C
    Hardware version: 433
    Serial number: 0006646371
    ODX name: EV_GatewNF
    ODX version: 013023
    Long coding: 030100047F085700EB00024A1C0F00010001070000000000000000000000

    Subsystems: 
        System description: J367-BDMConti
        Software version: 1050
        Hardware version: H03
        Serial number: 7588600000170828067D

        System description: E221__MFL-PR6
        Software version: 0160
        Hardware version: H02
        Serial number: 000000000C1816180817

    Trouble codes: 
        No trouble codes found

---------------------------------------------------------------
20 High Beam Assistance

    System description: FLA
    Software number: 3G0857511G
    Software version: 0003
    Hardware number: 3G0857511G
    Hardware version: H10
    ODX name: EV_HighBeamAssisAU33X
    ODX version: 001017
    Long coding: 0404010700000100000000

    Trouble codes: 
        No trouble codes found

---------------------------------------------------------------
42 Driver Door

    System description: TSG FS
    Software number: 5Q4959593E
    Software version: 0032
    Hardware number: 5Q4959593B
    Hardware version: 011
    Serial number: 0000274068925
    ODX name: EV_DCUDriveSideEWMAXCONT
    ODX version: 006001
    Long coding: 00110020D001040000001100

    Subsystems: 
        System description: FOND_FHSG_DRV
        Software version: 0007
        Hardware version: 006
        Serial number: 00000000000015935588
        Long coding: 1D0200

    Trouble codes: 
        No trouble codes found

---------------------------------------------------------------
44 Steering Assistance

    System description: EPS_MQB_ZFLS
    Software number: 5Q0909144T
    Software version: 1072
    Hardware number: 5Q0909144R
    Hardware version: 129
    ODX name: EV_SteerAssisMQB
    ODX version: 013144
    Long coding: 8107

    Trouble codes: 
        No trouble codes found

---------------------------------------------------------------
4B Multifunction Module

    System description: FCM MQB Low
    Software number: 3Q0907338
    Software version: 0286
    Hardware number: 3Q0907338
    Hardware version: 002
    Serial number: 29081710801494
    ODX name: EV_MultiModulContiVW48X
    ODX version: 001010
    Long coding: 000000030100046600003F01010000000000000000000000000000000000

    Trouble codes: 
        U12EB00 - Data bus front light Additional installations detected
            static
                Date: 2023-09-03 02:02:10
                Mileage: 168493 km
                Priority: 2
                Malfunction frequency counter: 34
                Unlearning counter: 141
                Unknown ambient data: 7C0000008000


---------------------------------------------------------------
52 Passenger Door

    System description: TSG BFS
    Software number: 5Q4959592E
    Software version: 0032
    Hardware number: 5Q4959592B
    Hardware version: 011
    Serial number: 0000272554428
    ODX name: EV_DCUPasseSideEWMAXCONT
    ODX version: 006001
    Long coding: 00110020D001040000001100

    Subsystems: 
        System description: FOND_FHSG_PSG
        Software version: 0007
        Hardware version: 006
        Serial number: 00000000000015998943
        Long coding: 050200

    Trouble codes: 
        No trouble codes found

---------------------------------------------------------------
5F Multimedia

    System description: MU-S-ND-ER
    Software number: 5Q0035874C
    Software version: 0480
    Hardware number: 5Q0035874C
    Hardware version: H41
    Serial number: SKZAZ2T5337681
    ODX name: EV_MUStd4CTSAT
    ODX version: 001022
    Long coding: 03730101FF00000051111201008800002F0208C601200500CF

    Subsystems: 
        System description: ABT_Std-2_Nav
        Software version: 8130
        Hardware version: H50
        Serial number: SKZ6ZHT1871718      

        System description: ECE DL2 2023 
        Software version: 1910
        Hardware version: ---
        Serial number: --------------------

    Trouble codes: 
        No trouble codes found

---------------------------------------------------------------
76 Parking Assistance

    System description: PDC 4 Kanal
    Software number: 5QA919283B
    Software version: 0044
    Hardware number: 5QA919283
    Hardware version: H07
    Serial number: 00030841961722901935
    ODX name: EV_EPHVA14AU3700000
    ODX version: 009033
    Long coding: 0601050011

    Trouble codes: 
        No trouble codes found

---------------------------------------------------------------
D6 LED Module Left

    System description: LED1L
    Software number: 7P5941591AD
    Software version: 0005
    Hardware number: 7P5941591A
    Hardware version: H06
    ODX name: EV_LED_PLUS_L_KEBODAVW416
    ODX version: 001003

    Trouble codes: 
        No trouble codes found

---------------------------------------------------------------
D7 LED Module Right

    System description: LED1R
    Software number: 7P5941591AD
    Software version: 0005
    Hardware number: 7P5941591A
    Hardware version: H06
    ODX name: EV_LED_PLUS_R_KEBODAVW416
    ODX version: 001003

    Trouble codes: 
        No trouble codes found

 

1 hour ago, classic said:

Are you sponsored by diagnosedan Graham 😀 ?

That video is going off on a tangent testing a quite different issue, so not much use to automass.

I think automass needs to test for a parasitic draw and he asked how to do that and my explanation is what I’d do. I actually don’t think that is going to be his issue but it needs to be ruled out.

No, not sponsored at all, merely trying to show @automassthat as he has had this ongoing problem now for at least 16 months and despite have now having not one new battery but two and keeps doggedly clinging onto the notion that is battery related even though he has posted a photo of the battery test which done under a load and still reading a voltage of 12.55V which is good and indeed the battery tester shows it as good on the display.

I agree with you 100%. Only joking about diagnosedan, he’s a genius, I love his videos. Automass is thankfully taking his car to an auto electric guy he knows. 

52 minutes ago, automass said:

Thanks everybody for trying to help me pin pointing the problem. guys, no body mentioned about the USB Charger. Can it not cause all the problems ( in case it has come in contact with liquid when dash cam and mobile charger cables were conneted).  Today I used another spare USB charger after cleaning the 12v port with electrical contact cleaner spray and surprisingly noticed that my dash cam is not getting powered off with start-stop which was not the case with usual USB charger (which was always connected in the port).

Now with this new battery, it is working fine with start-stop. but couple of times there were start-stop error occured. Diagnostic detected cyl3 and random misfire. I know already if there is start-stop error, there must be misfire detected which is always the case in my car. after restarting the car the problem goes away and start-stop works normal.

 

Anyway, I think I'll have my car checked up with local electrician who is expert on battery, alternator, start-stop problem and so on. I know for sure there is no electrical problem in my car, but well, those two modules (accidently activated) were always bugging me. who knows if they were draining the battery as someone already suggested here.

 

following are the dignostic result underneath if anyone knows how to disable those two modules.

 

OBDeleven data log

Date: 2023-09-03 12:36

    VIN: TMBBC7NE9J0155483
    Car: Skoda Octavia
    Year: 2018
    Body type: Estate
    Engine: CZDA
    Mileage: 168519 KM

---------------------------------------------------------------
01 Engine

    System description: R4 1.4l TFS
    Software number: 04E906027HD
    Software version: 3742
    Hardware number: 04E907309BH
    Hardware version: H26
    ODX name: EV_ECM14TFS01104E906027HD
    ODX version: 001007
    Long coding: 01250032232401080000

    Trouble codes: 
        P030000 - Random/Multiple Cylinder Misfire Detected     
        static
                Date: 2023-09-03 12:22:24
                Mileage: 168517 km
                Priority: 2
                Malfunction frequency counter: 1
                Unlearning counter: 255
                Engine speed: 684.50 1/min
                Normed load value: 14.9 %
                Vehicle speed: 0 km/h
                Coolant temperature: 79 °C
                Intake air temperature: 60 °C
                Ambient air pressure: 1020 mbar
                Voltage terminal 30: 12.557 V
                Dynamic environmental data: 20965011BE001313F47D35F40685F4464610D3000114B409C4
        P030300 - Cyl.3 Misfire Detected
            static
                Date: 2023-09-03 12:23:45
                Mileage: 168517 km
                Priority: 2
                Malfunction frequency counter: 1
                Unlearning counter: 255
                Engine speed: 684.50 1/min
                Normed load value: 14.9 %
                Vehicle speed: 0 km/h
                Coolant temperature: 79 °C
                Intake air temperature: 60 °C
                Ambient air pressure: 1020 mbar
                Voltage terminal 30: 12.557 V
                Dynamic environmental data: 209650F44643F40B571010039814B409C411990F3617460001432100

---------------------------------------------------------------
4B Multifunction Module

    System description: FCM MQB Low
    Software number: 3Q0907338
    Software version: 0286
    Hardware number: 3Q0907338
    Hardware version: 002
    Serial number: 29081710801494
    ODX name: EV_MultiModulContiVW48X
    ODX version: 001010
    Long coding: 000000030100046600003F01010000000000000000000000000000000000

    Trouble codes: 
        U12EB00 - Data bus front light Additional installations detected
            static
                Date: 2023-09-03 02:02:10
                Mileage: 168493 km
                Priority: 2
                Malfunction frequency counter: 34
                Unlearning counter: 141
                Unknown ambient data: 7C0000008000

Right, you only have 3 error codes showing in scan log, I have highlighted those for you above. If you disable module 01 Engine, you will kill the car completely, it is the engine control which runs everything. It reports   P030000 - Random/Multiple Cylinder Misfire Detected static but only shows this as happening once so may not be happening now so you should clear that error code and see if it comes back. It also shows error P030300 - Cyl.3 Misfire Detected static, again only happened the once, so clear the code and see if it comes back.

 

The other module 4B Multifunction Module, reports U12EB00 - Data bus front light Additional installations detected static, but this happened now 34 times, clear that code and see if it comes back

 

That U12EB00 error might well you problem, it might be kicking into life when it shouldn't, I can't be certain on that point however, hence why you should seek expert opinion about your problems.

 

Never leave anything plugged into a power socket, not even the USB mobile phone charger that show. Those sockets are constantly powered and that charger will draw power from your battery as long as it is plugged in, and should anything go wrong with the convertor inside of it, it could possibly be terrible news for you and your car, I have seen known these to overheat and catch fire before.

Edited 3 September, 20232 yr by Graham Butcher

6 minutes ago, Graham Butcher said:

Right, you only have 3 error codes showing in scan log, I have highlighted those for you above. If you disable module 01 Engine, you will kill the car completely, it is the engine control which runs everything. It reports   P030000 - Random/Multiple Cylinder Misfire Detected static but only shows this as happening once so may not be happening now so you should clear that error code and see if it comes back. It also shows error P030300 - Cyl.3 Misfire Detected static, again only happened the once, so clear the code and see if it comes back.

 

The other module 4B Multifunction Module, reports U12EB00 - Data bus front light Additional installations detected static, but this happened now 34 times, clear that code and see if it comes back

 

That U12EB00 error might well you problem, it might be kicking into life when it shouldn't, I can't be certain on that point however, hence why you should seek expert opinion about your problems.

 

Cyl 3 and random cyl misfire will not occure again until start-stop shows error which was causing probably/highly likely by the usb charging device. I can delete these cyl misfires but I wanna leave this for auto electrician . and the other codes from multifunction module can not be deleted.

22 minutes ago, classic said:

I agree with you 100%. Only joking about diagnosedan, he’s a genius, I love his videos. Automass is thankfully taking his car to an auto electric guy he knows. 

Thank god for that, he is clearly struggling with accepting the fact that it is not s simple as he thought it was.

 

Don't worry, I knew you were only joking. But you are right, he is a genius and modern cars are just complicated, and they have become so in order to meet stringent emission standards and increase their efficiency at the same time, but the complexity you put into a car, the more there is to go wrong, they became more expensive to repair and of course the electronics are designed to be throw away items and generally none repairable.

11 minutes ago, automass said:

 

Cyl 3 and random cyl misfire will not occure again until start-stop shows error which was causing probably/highly likely by the usb charging device. I can delete these cyl misfires but I wanna leave this for auto electrician . and the other codes from multifunction module can not be deleted.

OK, but there is noway that the charger is having any effect on the start/stop system, the charger and the power socket is not even connected to the cars network system, it purely connected to the battery via a fuse, so you can completely wipe any thought that is having an effect from your mind. But you do need to unplug it when you leave the car, to stop it draining the battery.

Edited 3 September, 20232 yr by Graham Butcher

I enjoyed the videos, cars have got too complicated, when this one dies of natural causes or through complications that I or no-one else can diagnose I am going to go backwards several decades and buy a Toyota BJ40 diesel jeep.

 

Just look how a tiny bit of data corruption on a Can line cost that guy over €3K in parts and lord only knows how much labour and he still has a few €K more to spend now he has the diagnosis!

 

I have a Chinese head unit talking to the Can network, that will be deep sixed at the first sign of any trouble.

1 hour ago, J.R. said:

I enjoyed the videos, cars have got too complicated, when this one dies of natural causes or through complications that I or no-one else can diagnose I am going to go backwards several decades and buy a Toyota BJ40 diesel jeep.

 

Just look how a tiny bit of data corruption on a Can line cost that guy over €3K in parts and lord only knows how much labour and he still has a few €K more to spend now he has the diagnosis!

 

I have a Chinese head unit talking to the Can network, that will be deep sixed at the first sign of any trouble.

The beauty about going backwards a few decades is that things were just so simple then and there simply loads of people out at weekends doing maintenance on their vehicles, something you rarely see now, hence why garages are normally booked up for weeks. The other advantage, at least here in the UK (you might be the same in France) and that after so many years I think you become VED free and also MOT free.

3 hours ago, Graham Butcher said:

OK, but there is noway that the charger is having any effect on the start/stop system, the charger and the power socket is not even connected to the cars network system, it purely connected to the battery via a fuse, so you can completely wipe any thought that is having an effect from your mind. But you do need to unplug it when you leave the car, to stop it draining the battery.

 

But in my car even with original battery it was always the case. when i had start-stop problem, i had the false misfire detected. No other problem but misfires.

24 minutes ago, automass said:

 

But in my car even with original battery it was always the case. when i had start-stop problem, i had the false misfire detected. No other problem but misfires.

I'm not sure what you are telling me here, could you explain a bit more to avoid confusion?

Edited 3 September, 20232 yr by Graham Butcher

There is no VED here, you pay a one off tax for the Carte Grise (registration document) on a new or second hand imported vehicle (the tax is imposed at first registration in France) which is amortized over how long you keep the vehicle, if you buy a new polluting vehicle it can be as much as €30K but the muppets that do so wear it as a badge of pride and never tire of telling people how much they had to pay, how few miles per litre of fuel it does etc.

 

The other end of the scale you pay very little and it halves when the vehicle is 4 years old, I paid IIRC €115 for the Octavia2 and maybe double that for the newer and higher rated in France Yeti.

 

CT test is every 5 years after 30 years of age, no CT required for pre 1960 vehicles.

6 hours ago, Graham Butcher said:

I'm not sure what you are telling me here, could you explain a bit more to avoid confusion?

 

I am trying to say misfire and start-stop problem are linked somehow in my case. So I am suspecting my USB charger in 12v port got something to do with it. even if I have my OBDeleven device connected in the OBDport for long time I get false misfire. you can ask me how do I know that there was a misfire. well, Start-stop doesn't work and shows Start-stop error, then I run the diagnostic and it detects nothing but cyl 3 misfire or both cyl 3 and random cyl misfire.

The summary is: when start-stop doesn't work (shows error) in my car that means there was misfire.

5 hours ago, automass said:

 

I am trying to say misfire and start-stop problem are linked somehow in my case. So I am suspecting my USB charger in 12v port got something to do with it. even if I have my OBDeleven device connected in the OBDport for long time I get false misfire. you can ask me how do I know that there was a misfire. well, Start-stop doesn't work and shows Start-stop error, then I run the diagnostic and it detects nothing but cyl 3 misfire or both cyl 3 and random cyl misfire.

The summary is: when start-stop doesn't work (shows error) in my car that means there was misfire.

This always happens when the is at normal running temperature? The misfire is causing the stop/start from working as the ECU thinks the car will struggle to start if the ignition system is suffering from misfires. The charger is having no effect on how the car behaves, please wipe that thought from your mind, you are  going down a dead end with that idea. 

What the charger is doing however is draining the battery if you leave it plugged in so always pull it out when not in use. 

 

The stop/start is very sensitive to things that may cause problems with the engine starting again, so it will always play safe and not stop to avoid leaving you exposed in what may be a dangerous position. So fix the misfire and it will work. Never disable any module as they all talk to each other anyway and will bypass a faulty module if it can. Did you not watch those videos I posted? 

@automass You said in an earlier post that you suspect the charger because the dashcam switches off when the stop-start cuts in. When this happens, dashcam is still working while the engine is off, right? But it switches off when the engine starts is just highlighting a completely unrelated problem, and this is solely to do with your dashcam. When the engines starts, the starter motor is drawing several hundreds of amps from the battery, causing a momentary volt drop which the dashcam cannot accept and switches off. How old is the dashcam? I suspect that the internal battery, like the one in the photo has failed due to age, or it has a super capacitor to store power and has failed, or, you also said that it was only a cheap dashcam, so that means that it has neither of these inside to provide enough power to keep it running when the battery voltage drops, as it does when the starting the car up.

 

If it is the latter, then it has always done this, but you have never really noticed until now and because the car not starting is a massive problem to you, that your mind is looking for something to blame and has latched onto the dashcam and the charger which is providing the 5v power supply as being linked and the cause. When in reality they are a symptom of another problem exasperated by the low battery voltage while starting the car. 

 

I got one of these 12v to 5v convertors that needs to be hardwired to a circuit that is only active while the ignition is on, so that means I have zero things left plugged into my 12v sockets which on Skoda's are alive 24/7, so when I stop the car and leave it, my dashcam and my TomTom satnav are automatically switched off, and cannot flatten the battery/

Edited 4 September, 20232 yr by Graham Butcher

2 hours ago, Graham Butcher said:

This always happens when the is at normal running temperature? The misfire is causing the stop/start from working as the ECU thinks the car will struggle to start if the ignition system is suffering from misfires. The charger is having no effect on how the car behaves, please wipe that thought from your mind, you are  going down a dead end with that idea. 

What the charger is doing however is draining the battery if you leave it plugged in so always pull it out when not in use. 

 

The stop/start is very sensitive to things that may cause problems with the engine starting again, so it will always play safe and not stop to avoid leaving you exposed in what may be a dangerous position. So fix the misfire and it will work. Never disable any module as they all talk to each other anyway and will bypass a faulty module if it can. Did you not watch those videos I posted? 

 

Thanks Graham Butcher for explaining it nicely. I didn't watch those videos as of now but planning to watch them.

 

My dash cam was always connected with the car and it never flateen the battery  up until 1yr and 4mnts..so problem started after 1yr and 4mnts time since the new battery was fitted. now the dash cam or even interior light or parking light is draining the battery which cause car not to be started. does it not sound strange!

 

I spoke to the auto electricial people that i said I am going to take my car to, but I am afraid they will be not much helpful for me..they can just check the alternator with the battery. they don't know coding.  I can not find any other hope. I went to volkswagen expert in North London last year and they appeared to be dodgy to me. I can go to them and they wil be charging me £140 to diagnose and put the car in factory coding. He, can not gurantee if it will fix the problem, but he said it will take the car back to the stage when the car left the production.

So, I don't know where to go..SKODA people will have long time waiting.

 

Edited 4 September, 20232 yr by automass

1 hour ago, automass said:

 

Thanks Graham Butcher for explaining it nicely. I didn't watch those videos as of now but planning to watch them.

 

My dash cam was always connected with the car and it never flateen the battery  up until 1yr and 4mnts..so problem started after 1yr and 4mnts time since the new battery was fitted. now the dash cam or even interior light or parking light is draining the battery which cause car not to be started. does it not sound strange!

 

I spoke to the auto electricial people that i said I am going to take my car to, but I am afraid they will be not much helpful for me..they can just check the alternator with the battery. they don't know coding.  I can not find any other hope. I went to volkswagen expert in North London last year and they appeared to be dodgy to me. I can go to them and they wil be charging me £140 to diagnose and put the car in factory coding. He, can not gurantee if it will fix the problem, but he said it will take the car back to the stage when the car left the production.

So, I don't know where to go..SKODA people will have long time waiting.

 

Yes the £140 price is about right, I had to have my car diagnosed a couple of years ago when I was getting a ABS error on the N/S rear wheel. I managed to out the sensor and with my equipment it seemed to OK but the error would keep happening from time to time. So I decided i needed better diagnostic tools and these are so expensive, I tried to book it into my Skoda garage but they were fully booked for the whole month, so I booked it into VAG specialist for having a proper scan done with the same tools as the factory uses and yes it was the sensor that failed enough my tests showed it was OK, a new sensor was fitted, and the problem never happened again. So yes, the scanning is costly but if it can pinpoint the faulty part and once the part is replaced and the problem is cured, it well worth the cost.

I went to few battery and alternator experts (this is what they claimed anyways) this morning. Almost everybody tested the battery with voltameter and said alternator is fine. one of them even took the Positive terminal off while the car engine was running to establish that the alternator is working fine.  So, yes alternator seems working fine.

 

point to be noted here  that the fault code in the car obdeleven was not occured by the car. it was by me while trying to fix the headlight label. I  mistakenly selected an option which i forgot what option it was.

https://forum.obdeleven.com/thread/9616/4b-multifunktionsmodul

 

N.B: if the fault code was generated by car i would definitely be worried and take the car to vag especialist. What I can think now is, dash cam is draining the battery and I will keep it unpluged when I am leaving the car. As I am using the new USB charger I can see dash cam is always on even if I leave the car overnight. and ofcourse my previous battery was faulty or became weak because the dash cam was constantly drainig the battery.

Edited 4 September, 20232 yr by automass

6 minutes ago, automass said:

I went to few battery and alternator experts (this is what they claimed anyways) this morning. Almost everybody tested the battery with voltameter and said alternator is fine. one of them even took the Positive terminal off while the car engine was running to establish that the alternator is working fine.  So, yes alternator seems working fine.

 

point to be noted here  that the fault code in the car obdeleven was not occured by the car. it was by me while trying to fix the headlight label. I  mistakenly selected an option which i forgot what option it was.

https://forum.obdeleven.com/thread/9616/4b-multifunktionsmodul

 

N.B: if the fault code was generated by car i would definitely be worried and take the car to vag especialist. What I can think now is, dash cam is draining the battery and I will keep it unpluged when I am leaving the car. As I am using the new USB charger I can see dash cam is always on even if I leave the car overnight. and ofcourse my previous battery was faulty or became weak because the dash cam was constantly drainig the battery.

So they all say that the alternator is fine, and yet you still get a flat battery, so something is clearly not right, the only way to eliminate the charger is completely unplug it each time you leave the car, if you are still getting a flat battery, then you must have the entire electrical system checked out, and you might have to be without your car for a few days while they track down the problem.

 

In one of those videos I sent you, it took a few days to discover what was causing the problem and he left the car running for a whole day before the fault showed up. Like I said before, things have got really complicated these last few years and they will get even more complicated when we all drive EV's in the future because there is so much electronics and networking in those cars and that is going to be one massive steep learning curve for the garages.

9 minutes ago, Graham Butcher said:

So they all say that the alternator is fine, and yet you still get a flat battery,

I don't get any flat battery with this newly replaced (2days ago) less powerful battery by halfords which I and you are not happy about. I Just I couldn't take that the other battery (75ah) which was a year and four months old can go faulty. hence we were trying to pin point the fault of the car.

32 minutes ago, automass said:

I don't get any flat battery with this newly replaced (2days ago) less powerful battery by halfords which I and you are not happy about. I Just I couldn't take that the other battery (75ah) which was a year and four months old can go faulty. hence we were trying to pin point the fault of the car.

Oh I see, but there is no reason for the larger capacity battery to give you a problem as long as the system is coded with the capacity etc it will still charge it up OK, so the battery was never the problem, it might well have been before they fitted that bigger battery, but that battery itself has not been the issue at all. The basic difference between the batteries is that the smaller capacity is fine for smaller engines, especially petrol engines like yours because their compression ratio is much lower than a diesel like mine, which does need the extra capacity because diesels have far higher compression ratio and so the starter motor will need the AH capacity from the battery.

 

So just don't get too complacent that the flat battery problem has been resolved, because it quite simply hasn't. Whatever the cause is, is still there lurking waiting to strike again and mark my words, it will when you least expect it.  

Edited 4 September, 20232 yr by Graham Butcher