Thanks everybody for your valuable advice. It's really frustrating that I am getting the similar issue like last year (right before the battery replacement). it's not only the battery, as I was driving, my strat-stop was not working..then i ran the diagnose and it detects maltiple cylander misfire , cyl3. i couldn't feel any loss of power anyways (same as last year). so, just wondering, how they all are connected..which one to be blamed. battery, or spark plugs. i changed my battry on April 2022, so it is fairly new and then changed the spark plugs on July 2022 (mileage was 72736 and now 104150). Suppose dash cam was running the battery down which causing engine not to start..then what about misfire of cylender? why they are popping up in diagnose?  I am getting really annoyed and frustrated now.

 

N.B: Cyl3 misfire seems very common for me. never seen cyl 4, 2 or 1. it's random cyl or cyl3 misfire

Edited 29 August, 20232 yr by automass

What diagnose system are you running? Does the car feel / sound / different to normal? Has it been suffering from lack of power? When was it last serviced and by whom, i.e., was it done by a garage / dealer or did you do yourself?  Does the car run hot, do you have to keep topping up the oil or water? Do you have any warning lights in the instrument cluster etc?

 

It is common for the start/stop system not to operate, I believe if the engine cooling fan is running or if the aircon is working really hard.  It sounds as if it would be a good idea to book the car in with a Skoda service centre for them to cast an eye over it and do their diagnostic checks.

Edited 29 August, 20232 yr by Graham Butcher

it's OBDeleven diagnostic. car's seems bit rough, very negligible though. I did service myself...just changed the oil and air filter only. and also i topped up a little bit oil today as i saw it is little low than the full. no warning light whatsoever. as I said, last year I had the similar issue with problem of start-stop system + cyl misfire etc..

 

N.B: I don't have spark plugs removing tool especially that long metal socket. otherwise I would have checked myself this time.

Edited 29 August, 20232 yr by automass

Well in that case, you do really need to get a plug removal tool and clean / check them and if required adjust the gaps. Perhaps even replace plugs with new ones.

 

On 29/08/2023 at 07:33, xman said:

 

I went to halfords again and they checked the battery. They said battery is ok..may be electrical fault causing start-stop not working. They recommended me to have the car checked up by halfords autocenter. My OBDelevenbis plaing up now . can't diagnose any more..it says 'Device is not authorized'

22 minutes ago, automass said:

I went to halfords again and they checked the battery. They said battery is ok..may be electrical fault causing start-stop not working. They recommended me to have the car checked up by halfords autocenter. My OBDelevenbis plaing up now . can't diagnose any more..it says 'Device is not authorized'

I think I'd be inclined to the dealership for checking. They have factory approved tools and should be able to resolve your problems once and for all.

 

I had Halfords autocentre do the headlight alignment for me twice I had to take it back as with their aiming the only safe speed at night was about 20-30mph on country roads as the headlights only shone up the road for about a car length giving me a great pool of light and darkness beyond, very dangerous. They said it was done on their MOT approved head adjustment machine, said that if they were any higher drivers would be dazzled and flash me.

 

I ended up doing it myself in the end using a brick wall and aiming the headlights up until they looked OK. Much better now, can see just as good as I could with my old car and all the others before it. That was nearly 3 months ago and not a single person has even flashed me to say they were being dazzled by them. I won't be going back Halfords autocentre anytime soon. 

Edited 30 August, 20232 yr by Graham Butcher

I also don't like halfords autocenter myself. i went to my local regular garage but they are enormously busy. said me to call them after 4th September to arrangea a day. I tempt to pull out the ignition coils and spark plugs myself. Can I pull the ignition coil packs myself without any tool? and I'll try to buy a long metal 16mm socket from shops to unscrew the spark plugs. they have been used for a year and 30k miles. do you suspect, ignition coils or spark plugs life is over?

48 minutes ago, automass said:

I also don't like halfords autocenter myself. i went to my local regular garage but they are enormously busy. said me to call them after 4th September to arrangea a day. I tempt to pull out the ignition coils and spark plugs myself. Can I pull the ignition coil packs myself without any tool? and I'll try to buy a long metal 16mm socket from shops to unscrew the spark plugs. they have been used for a year and 30k miles. do you suspect, ignition coils or spark plugs life is over?

Well, consider you may be spending money for no reason here as your OBDeleven you said is now playing up and is displaying "Device is not authorized" so it might be that the device has been lying to you about the misfiring, you did say before that you were getting some odd results with the claimed misfiring apparently jumping around various cylinders.

 

Is the car currently drivable or not? If it is, and appears to be running OK, it might pay to book in at your garage as the 4th Sept is only next Monday so you could maybe drive it till then? Its your call at the end of the day. What you do is a risk either way.

Edited 30 August, 20232 yr by Graham Butcher

Since unplugging the camera does the battery go flat overnight?

1 hour ago, ords said:

Since unplugging the camera does the battery go flat overnight?

No, but star-stop wasn't working...battery seems fine now .

3 minutes ago, automass said:

No, but star-stop wasn't working...battery seems fine now .

Does any reason for start-stop not working show up on the infotainment screen? There's an option to see the reason, I think it's under CAR?

1 minute ago, PetrolDave said:

Does any reason for start-stop not working show up on the infotainment screen? There's an option to see the reason, I think it's under CAR?

No, it doesn't show the reason. when i scanned, it gave me fault for cyl3 misfire + random cyl misfire only.

 

OBDeleven data log

Date: 2023-08-29 23:17

    VIN: TMBBC7NE9J0155483
    Car: Skoda Octavia
    Year: 2018
    Body type: Estate
    Engine: CZDA
    Mileage: 167650 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: 2023-08-29 22:40:19
                Mileage: 167627 km
                Priority: 2
                Malfunction frequency counter: 1
                Unlearning counter: 255
                Engine speed: 752.50 1/min
                Normed load value: 16.1 %
                Vehicle speed: 0 km/h
                Coolant temperature: 96 °C
                Intake air temperature: 50 °C
                Ambient air pressure: 1000 mbar
                Voltage terminal 30: 13.028 V
                Dynamic environmental data: 20965011BE000C13F4820EF40683F4463810D3001A14B408FC
        P030300 - Cyl.3 Misfire Detected
            static
                Date: 2023-08-29 22:40:25
                Mileage: 167627 km
                Priority: 2
                Malfunction frequency counter: 1
                Unlearning counter: 255
                Engine speed: 752.50 1/min
                Normed load value: 16.1 %
                Vehicle speed: 0 km/h
                Coolant temperature: 96 °C
                Intake air temperature: 50 °C
                Ambient air pressure: 1000 mbar
                Voltage terminal 30: 13.028 V
                Dynamic environmental data: 209650F44638F40B21101000A314B408FC1199100017460001432100

11 minutes ago, automass said:

No, but star-stop wasn't working...battery seems fine now .

Good, so we seem to have cured the battery problem, so it was the dashcam after all then?  Take my advice and get yourself the hardwire kit so that it automatically switch ON and OFF with the ignition and then that issue should never occur again and more to the point, you won't forget to switch on. If an accident is going to occur, you bet that its more likely to happen the time you forget to plug the camera in.

Thanks Graham Butcher. tbh, I am not worried for the dash cam for the moment. start-stop is my concern now and diagnose said misfires...but doesn't feel any..so it happens last year ..I am in the same loop again.

What do you see when you scan module #19? Anything showing under the Battery Monitoring Control Module J367 that is a subset of #19?

Edited 30 August, 20232 yr by PetrolDave

1 minute ago, PetrolDave said:

What do you see when you scan module #19? Anything showing under the Battery Monitoring Control Module J367 that is a subset of #19?

No nothing, I would have said if there was any other fault.

Just now, automass said:

Thanks Graham Butcher. tbh, I am not worried for the dash cam for the moment. start-stop is my concern now and diagnose said misfires...but doesn't feel any..so it happens last year ..I am in the same loop again.

I thought you said that the Start/Stop sometimes worked and not at other times? Is that not the case? Mine sometimes works and not at other times. I have tracked mine to what I think is the cause as it never stops if the rad fan is running because the engine is hot, or if the aircon is set really low as the system seems to favour comfort over economy, this I discovered by slowly turning the temperature up until it gets almost to the point of the outside temperature, at which point, start/stop works OK. Lower the temperature and the engine kicks back into life again to power the aircon.

 

I thought you said that the OBDelevan was displaying error messages about being not being authorised? If so then you cannot rely on the log it provides?

OBDeleven is not connecting with the device from today. I tried to rescan to delete the error of misfireings which wasn't deleting yesterday. I sent email to the custoemr care dept for OBDEleven. anyways, I tried everything, I mean my ac/fan/mobline charging everything was off, but still it didn't work for start-stop. yesterday the fault was not even deleting about misfires...so I was guessing if the misfire is genuine or not and if it is the case for start-stop being not working!

 

NB: I forgot to add something. As i had my dash cam connected with the mains in the house, i never saw it switched off which is not the case in the car..in the car if it is long drive, i can see the dash cam goes off. so does it mean my alternator is not charging the battery and therefore dash cam can not have enough power supply. The halfords guy said alternator kicks in after 1-2 hrs long drive.

Edited 30 August, 20232 yr by automass

The thing to remember with Start/Stop is that the engine has, and the air needs to at a certain temperature before it will kick in, so on colder days it will take quite a bit longer to become operational. and then of that is very dependent on how the system is seeing your battery charge level etc, if the battery monitor things that the battery does not contain sufficent charge, it will not allow the Stat/Stop to operate. On my old car sometimes if I had been using the radio or DVD player while the engine was off for any length of time, it would allow the system to operate until I had driving for some considerable distance while it topped the battery up again.

4 hours ago, Graham Butcher said:

The thing to remember with Start/Stop is that the engine has, and the air needs to at a certain temperature before it will kick in, so on colder days it will take quite a bit longer to become operational. and then of that is very dependent on how the system is seeing your battery charge level etc, if the battery monitor things that the battery does not contain sufficent charge, it will not allow the Stat/Stop to operate. On my old car sometimes if I had been using the radio or DVD player while the engine was off for any length of time, it would allow the system to operate until I had driving for some considerable distance while it topped the battery up again.

I think you mean "wouldn't allow"?

3 minutes ago, ords said:

I think you mean "wouldn't allow"?

Yep I did, I had a phone call coming in and just wanted to post it, so I could concentrate on the call, it was an important one.

4 hours ago, Graham Butcher said:

The thing to remember with Start/Stop is that the engine has, and the air needs to at a certain temperature before it will kick in, so on colder days it will take quite a bit longer to become operational. and then of that is very dependent on how the system is seeing your battery charge level etc, if the battery monitor things that the battery does not contain sufficent charge, it will not allow the Stat/Stop to operate. On my old car sometimes if I had been using the radio or DVD player while the engine was off for any length of time, it would allow the system to operate until I had driving for some considerable distance while it topped the battery up again.

It's a strange system. The other day, I used my car after standing for a couple of weeks and s/s worked at the first stop I made. A few hours into the journey s/s stopped working. No heavy  demand on the electrics or the a/c. After awhile it worked again.

12 minutes ago, ords said:

It's a strange system. The other day, I used my car after standing for a couple of weeks and s/s worked at the first stop I made. A few hours into the journey s/s stopped working. No heavy  demand on the electrics or the a/c. After awhile it worked again.

Maybe it was doing a regen of the DPF? Mine also stops at times after a long trip the day before or on a really warm day, at the first stop.

Edited 30 August, 20232 yr by Graham Butcher

I think, its definitely battery is faulty. I have been driving since 4hours and no power loss,nothing. start-stop is activated but it is not stopping. It says vehicle power consumption is high. Ac is off in luding fan. I kept on looking at the battery status in my OBDeleven.. i saw it is charging..and volt was jumping from 13 to 14.8 and stable in 13..halfords should replace the battery..

 

Edited 30 August, 20232 yr by automass

I wouldn't be too hasty to jump to that conclusion, it could be many things, loose or worn out drive belt, bad connections on the alternator, bad coding of the ECU with regard to the battery information, bad charging regulator. The forum also shows your location as being London, UK and if you have been driving for 4 hours there tonight, it means that you had your lights on. It could even be something like the heated rear screen relay might be welded up so that all the time the ignition is on, so is the heated rear screen. You say the AC is off and so is the fan, which fan are you talking about, the heater/AC fan or the big powerful cooling fan at the back of the radiator?

 

If you don't have the knowledge and the equipment to test each of these possibilities in order to eliminate them from the equation, you ought to get your garage to check it out. It could be that the comms network has intermittent connections somewhere in the circuit, or even a short circuit on the comms line of the CanBus.

 

If you took the battery to the store that you purchased it from, and they tested it with a proper tester that applies a load to the battery and measure the voltage under the load, and it passed, then it is unlikely to be faulty as their tester would certainly have shown it. Just in case the person who tested it wasn't sure of how to use the tester, you could also try taking it to another branch, there are many in London to choose from.