HI all, without going through the whole site for a few hours does anyone know if there is a definitive resolve to the battery drain issues of the Octavia, I seem to recall I seen somewhere about changing a module ?  Anyone know the details, I am really thinging about selling this car due to his very annoying issue. I do not use my car sometimes for four or five days at a time and regardless of fitting a new battery etc I still find after about 4 days it won't turn over !  I then have to get out the jump leads etc etc etc....

 

I've had enough either it gets sorted or its going !  Might seem silly taking this stance but I simply want a car I can go out to and turn the key and it starts, I know its not a new car by any means but I've had many older cars that start on the button after standing for months, this won't even last a week.

 

SKODA hang your heads in SHAME

 

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

 

Address 09: Cent. Elect.        Labels: 3C0-937-049-30-H.lbl
   Part No SW: 3C8 937 049 E    HW: 3C8 937 049 E
   Component: Bordnetz-SG     H54 2602  
   Revision: 00H54000    Serial number: 00000006013613
   Coding: 418A0F030004140043110D000000000000087F075C000000000000000000
   Shop #: WSC 73430 790 00000
   VCID: 3365F94752C0B386591-8066

   Subsystem 1 - Part No: 1Z2 955 119 C  Labels: 1KX-955-119.CLB
   Component: Wischer 090808 022  0601  
   Coding: 00055223
   Shop #: WSC 73430  

   Subsystem 2 - Part No: 1K0 955 559 AH  Labels: 1K0-955-559-AG.CLB
   Component: RLS     011008 054  0402  
   Coding: 00471277
   Shop #: WSC 73430

 

 

 

Address 19: CAN Gateway        Labels: 1K0-907-530-V3.clb
   Part No SW: 1K0 907 530 Q    HW: 1K0 907 951
   Component: J533__Gateway   H16 0202  
   Revision:   H16       Serial number: 2700
   Coding: E9837F0E0002022303
   Shop #: WSC 73430 790 00000
   VCID: 3561C75F5CB4ADB6775-8060

 

 

Address 46: Central Conv.        Labels: 1K0-959-433-MAX.clb
   Part No SW: 1K0 959 433 BT    HW: 1K0 959 433 BT
   Component:    KSG PQ35 G2  020 0204  
   Revision: 00020000    Serial number: 00000000000000
   Coding: 81801A085283007F3F04850540085F96907CA0
   Shop #: WSC 73430 790 00000
   VCID: 8305E987C2E04306091-80D6

   Subsystem 5 - Part No: 1Z0 951 171
   Component: Innenraumueberw.008 4801  
   Coding: 00000000
   Shop #: WSC 73430  

 

 

 

I thought the above might be useful for those in the know.... I chose anything I seem to recall was involved.
 

 

It might help if you post up a full autoscan and list any electrical modifications you have had done

Mike as always you are the fountain of knowledge....lol, THANK YOU..  The vehicle diod actually come with a bolero and I changed that back to the standard stream HU.  Still had the issue after doing that and have done ever since... Its now really getting me annoyed, I have been around the car very carefully and it would seem that almost ALL cabling and modules, relays etc have/were removed, I guess what I could do is to place a simple switch in the power feed to the radio to confirm it is the radio causing the drain which I believe was something to do with the original issue, something about it running but not being on ?  IF that cures it I guess I can then go more in depth into the wiring which I do recall did not look very original but all seemed to work as it should so never really thought anymore of it. 

 

As you say it has the Q version and from what I've read over the past few days since posting and like you say should not have the drain issue.

 

Another reason to compound the problem is I'm not using the Octi every day now as I have a 2011 VW T5.1GP as well so I tend to take whatever keys come to hand when I'm leaving the house.....  I really ought to sell the Octi but it is such a nice car and I do enjoy driving it particularly since its remap, its a different drive, much more enjoyable and far better economy, on a run I can now regularly get up to 60mpg at around 70-80mph on a motorway run. Trouble is its worth more in parts than it is in one piece !

Although if I was offered around 2k I guess I would reluctantly accept it, its not a pretty car due to paintwork but I guess if someone spent a couple of grand on it, it would then be forecourt condition and value.

 

Anyway Thanks again Mike, I will whip the radio out tomorrow (subject to weather) and put a flick switch inline to see if I can stop the drain, if it does then I'll investigate the wiring to it from the radio back to the loom or visa versa....

 

regards

If you have battery drain with a Q gateway then you have a problem

 

Autoscan is what is required

I had a Battery drain on an Octavia Mk2 2009 VRS, thought it was the radio as it was pulling 1.2 amps when powered down, then located it to the Can Bus which was pulling .680 milliamps with radio fuse out also when powered down but it was neither of these. It turned out to be the Heater/AC control module in the centre console. It was pulling micro amps but held the Can Bus up and thus held the Radio Up which was masking the real fault. I changed the heater control module for a salvaged one from the same car and year, same product code, this solved the problem completely. So may I suggest you pull the heater module fuse first before resorting to Can Bus problem, just in case.

 

TIP 1. To check for current drain, the easiest way I have found is to measure the small voltage drop across the fuse, use milli volt setting, its very small if it is drawing current but it saves pulling fuses and gives you better indication as to what is drawing power.

TIP 2. The current draw when shut down should be very low in the micro amp range, when I cleared this fault it was only taking micro amps from the battery. If you monitor the battery voltage you can see if it is falling over time and it should not drop significantly over three to four days, only a few Micro volts are lost, this is a way of checking you have solved the problem completley, without having to remove the battery lead etc.

 

Hope this helps.

Forgot to say that a full VAG COM diagnostic check did not find this fault, the main dealer gave the car an all clear when I had work done even though I knew the car was faulty. (They would charge a fortune to find this fault) I had already removed the radio fuse believing this to be the fault when they did the health check, but not cleared the fault as I first thought, they came back saying everthing was working correctly and there were no faults on the computer, even though the Can Bus was not shutting down completely, because of the nature of the failure on this module, which works perfectly but still draws current thus causing the battery drain as described, no VAG check will find it, the computer doesn't know that it is drawing a slight current, it tests normal.

 

To me this is a VW/Skoda design fault, there should be some indication if the battery is being drained when the car has been shut down but there is nothing, other than a no start the following morning or after a couple of days. A fault like this should not basically immobilise the vehicle, because a dead battery means the car is useless.  A simple warning light would do, saying that excess current is being drawn then at least you are not left stranded as you could either check it yourself or seek help before you can't drive the vehicle, it can't be beyond VW/Skoda to impliment this via the ECU I would have thought?

 

Thanks for info andersp5, I seem to have resolved the issue since posting, I'd found the previous owner police or person I got it from who bought several direct from the police had wired the centre console power socket and radio together and radio was not shutting down completely hence the draw, I have not had a flat battery or any other similar flat issues since I found this and resolved for me at least.....

Glad to hear that the problem has been solved andybristol, these battery drains are certainly more common than I realised. I think VW/Skoda should look into them in greater detail because they mar what is a very good car and like you, I was thinking of getting rid too because the car becomes basically useless when it flattens the battery like this. OK your problem may well have been caused but mine certainly wasn't and its not really good enough from VW/Skoda in my opinion. Hopefully, now this fault is highlighted in the Briskoda database others will find it useful. 

1 minute ago, andersp5 said:

Glad to hear that the problem has been solved andybristol, these battery drains are certainly more common than I realised. I think VW/Skoda should look into them in greater detail because they mar what is a very good car and like you, I was thinking of getting rid too because the car becomes basically useless when it flattens the battery like this. OK your problem may well have been caused but mine certainly wasn't and its not really good enough from VW/Skoda in my opinion. Hopefully, now this fault is highlighted in the Briskoda database others will find it useful. 

 

The most common reason for battery drain issues on the MK2 Octavia (and similar cars) is down to fitting headunits that are newer than the car. This is not a fault, it's down to using incompatible parts. The fix is well understood, namely a newer CAN gateway that is compatible with the headunit.

 

Any faulty component, modified wiring or poorly fitted accessory has the potencial to cause issues including battery drain, this goes for all ages/makes/models of cars. I don't think I've ever seen a car with a warning light for 'excessive battery drain with ignition off', only warnings for low battery voltage or alternation output while running. Good fault finding with an understanding of how CAN-bus equipped cars is the key to tracking the cause down and fixing it. Namely waiting for the car to 'shut down' and measuring voltage drops (and therefore current) across fuses rather than removing them.

 

In your case, it was due to a faulty component but I can't say I've seen another report of a HVAC panel failing in the same way. I'm not saying it's never happened, just it's not common in my experience.

 

Still, I'm glad you managed to find a relatively simple/inexpensive fix to what is definitely an annoying problem

Thanks..

A few years ago I had a guy come with a late 2008 Golf who had battery drain

 

CAN Gateway was fine, no faults

 

Checked the fuse for the radio, and it was not shutting down.

 

Ran out of time so he took the car to VW, They changed the Climate panel which fixed the issue