Intermittent brake servo failure with 40 different fault codes at the same time

[rahankuivaaja]

I have 2014 Golf Variant with 1.4 TSI and 7-speed DSG. Recently I've been having this brake servo failure issue that comes randomly.

First it started appearing when cold starting with or without Webasto pre heating. The symptoms were that the car wouldn't start and then brake servo failure, esc, tpms, abs and tons of other fault codes would appear and then the radiator fan would turn on and wouldn't turn off until I took the fuse out (removing battery doesn't help it just turns on again). Then I would reset the fault codes and put the fuse back in and the car would start and no fault codes are present anymore.

But today it happened while driving. Engine turns off, gear goes to neutral, radiator fan turns on and fault codes appear. And again reseting the abs codes allowed it to start again with no fault codes.

Any idea where to start looking the fault from? Unfortunately I haven't been able to read the ABS fault codes properly since I used Carista and it showed only numbers and I usually was in a hurry so I couldn't look them up. But here are all the codes except abs (some codes are from removing fuse:

Basic OBD2:
P0458 (Pending) - Evaporative Emission System Purge Control Valve Circuit Low
P2088 (Pending) - "A" Camshaft Position Actuator Control Circuit Low Bank 1

CAN network gateway:
131702

Engine:
04635
04640
09490
02798
04235

Power steering:
23298
22276
22530

Instrument cluster:
16776988

Parking/steering assist:
13637426 - Databus - Received Error Message


Obtained with Carista 7.1 for Android.

Thanks.

 

[moshpit]

Hey rahankuivaaja,

Did you ever figure this out? I've had the same car for 10 year and this issue just started presenting.

Cheers