I have had the engine warning light come on and the van slows down. I have had a new pedal fitted £200 but it is still happening. The AA have done a check and said that the fault code P1120 shows accelerator pedal position sensor 1 voltage too high. What could be the problem?
Electrics, ECU, Warnings & Lights
You'd have to check the V at the sensor,
should be 5 V.