Hi all,
Picked up a B7 Avant with a 2.0 TDi BRE PD engine in it a few weeks ago and it has started throwing a problem at me.
TLDR: When pressing the throttle the coil light starts flashing, ESP light is always on. This happens even when the ignition is on but the engine is off also. Throttle response seems fine after replacing a faulty throttle pedal.
Long story: After plenty of rain I noticed the drivers footwell was very damp, shortly afterward I started experiencing throttle jerkiness and at the same time the ESP light would illuminate and the coil light flash. A quick Google suggested water ingress via the ECU box so I got the spanners out. Drain holes were fine but the ECU box was missing one nut on the back towards the centre line, so I cleaned everything up, bolted it down properly, dried everything out and sprayed all contacts with electrical cleaner.
Still did it all so no joy, by now the problems were constant and if you mashed the throttle it might go to 2,000 rpm but it fluctuated wildly. My suspicion was a dead throttle pedal, got a 2nd hand one from a breakers and fitted it today. The throttle now works smoothly, before it was all over the place, but when pressing the throttle for the first time the coil light starts flashing, ESP light is always on. This happens even when the ignition is on but the engine is off also. Throttle response seems fine after replacing a faulty throttle pedal.
Not sure what's causing the error, I suspect I might need to do a throttle calibration or something, but can't find any helpful evidence.
Please can anyone help?