Technical P0220 Ducato X244 / 2005 / 2.8JTD

[Blueywr1]

Evening all

It's been a couple of months since you helped me identify and fix the non-starting problem caused by the Sigma immobiliser. Sadly we have experienced more costly vehicle repairs since - a turbo replacement.

We now have another niggly problem and despite reading some historical threads, I am back to seek guidance.

Vehicle starts ok and runs fine, however, when the accelerator pedal is pressed, the EML illuminates red.
OBD code is P0220.
The OBD scanner graph recognises the accelerator being pressed, in the live graph section.
Code will clear, but then returns next time the vehicle is started and accelerator is pressed.

I have replaced the accelerator pedal - fault remains.
I have removed the connector plug (6 wires) from the accelerator pedal. There is no damage.
I have accessed the multiplug (D004 I believe) from the base of the fuse box in the engine bay. There is no obvious damage and no water ingress.
I am struggling to trace the wires from the accelerator (6 pin plug), as they seem to go through the floor. The rubberised flooring is difficult to manipulate. I note from historical threads, that there is another connector plug before the ECU, but I am aware that @Communicator has a similar vehicle and has offered help to other members with this fault, but I believe that the help was for the X250 vehicle.

Can anyone please offer any guidance to help me (and my apprentice - whom will be by my side (begrudgingly all weekend )) trace and fix the fault?

Thanks

 

[Communicator]

If I understand correctly then your inspection of the wiring has been general, rather than specific.

I am afraid that I do not have a magic wand to wave, but I can supply copies of eLearn diagrams, which may have been corrected, or annoted by me.
I have not included the Engine Connector D004A, of which there are 9 different variations. The appropriate pins are on the engine management diagram, for which I have assumed that the "green filter" version is appropriate. (My green filter is black.)

I cannot see why the accelerator pedal cable should exit via the floor, but it will have to pass into the engine compartment somewhere.