Please can anybody help ?

The EPC and ESP lights on my 02 Petrol A4 2.0L have come on and won't reset.

This has happened a few times before but has always reset if the ignition is switched off and back on again.

When these lights come on the engine goes in to a kind of 'safe mode' whereby it will run but only with limited power.

I've had it plugged in to a diagnostic machine at the local garage and the fault code says something about the 'Throttle position sensor'.

Can anybody shed any light on this before i start pulling it to bits in the morning ?

 

Throttle Position Sensor see how hard you press the gas pedal meaning.. it calculate how much acceleration you want.
if the sensor is not working well, Electronic Power Control (EPC) cannot work properly.
Same thing for ESP (Electronic Stability Control).
I am assuming you have an auto tranny.

Check if there is any problem with the throttle pos sensor first since the code is saying it is the problem.
srry i don't know where it is located.
good luck