Fault

[Miguel 7]

Any ideas what it could be?
Been driving with this fault for 2 years now with no issues but I think it's time to get it sorted

Address 19: CAN Gateway (J533) Labels: Redir Fail!
Part No SW: 5Q0 907 530 M HW: 5Q0 907 530 F
Component: GW MQB High 125 1144
Revision: -------- Serial number: 0000975523
Coding: 030100F40B087600EF0006E8080F00010001000000000000000000000000
Shop #: WSC 00049 770 00103
ASAM Dataset: EV_GatewLear 009013
ROD: EV_GatewLear_SE37.rod
VCID: 3B7341B7B2E772C68EF-806E

Alternator:

Multifunction unit control module:
Subsystem 2 - Part No SW: 5F0 959 537 B HW: 5F0 959 537 B
Component: E221__MFL-PR6 H03 0120
Serial number: 000000000A0189050713
Coding: 002000

Battery Monitoring Control Module:
Subsystem 3 - Part No SW: 5Q0 915 181 D HW: 5Q0 915 181 D
Component: J367-BDM H08 0192
Serial number: 00000000004051996230

1 Fault Found:
8520138 - Control Module for Battery Monitoring
P1B02 00 [009] - Defective
Confirmed - Tested Since Memory Clear
Freeze Frame:
Fault Status: 00000001
Fault Priority: 1
Fault Frequency: 1
Reset counter: 226
Mileage: 76892 km
Date: 2018.05.08
Time: 20:11:36

 

[RUM4MO]

Just a couple of questions:- 1) is the lead that should be connected to the BMS actually plugged into the plastic dongle at the battery -VE post. 2) does auto Stop/Start work for this car?

Now if you can clear that fault and it does not return, then I think that it was just a transient or ghost glitch that has caused that fault to be logged, if your car is still under warranty, I's guess that they would check for stored fault codes, read and consider any stored codes, clear all stored codes and say "come back if it returns and we'll look into it a bit more".

 

[Miguel 7]

Just a couple of questions:- 1) is the lead that should be connected to the BMS actually plugged into the plastic dongle at the battery -VE post. 2) does auto Stop/Start work for this car?

Now if you can clear that fault and it does not return, then I think that it was just a transient or ghost glitch that has caused that fault to be logged, if your car is still under warranty, I's guess that they would check for stored fault codes, read and consider any stored codes, clear all stored codes and say "come back if it returns and we'll look into it a bit more".

Everything seems to be in place
Start stop has been deactivated, about 2 years after deactivating this started popping up, but you're probably right about linking this to start stop, i should have mentioned, when I start the car I get a warning on the dash the first time I stop after starting up if that makes sense, says start stop error but nothing else.
Not in warranty any more, and I've cleared the faults several times now but this one keeps coming back.
Re activated the start stop to see if it fixes it but it won't work.

 

[black_sheep]

I had a similar fault to this when my previous Mk3 Leon was a few days old. The first time it occurred the glow plug light was pulsing on/off, and the stop/start warning came up on the infotainment screen/MFD. I will take a look over the weekend to see if I can find the VCDS scans.

In summary, the battery control module had failed; because the car was one of the first FRs in UK, and I was driving it back to Germany that day, the dealer had to cannibalise parts from their showroom model in order to get me back on the road.