Error code 0220 Accelerator Potentiometer

[Adrian1961]

Need some help and guidance with a Rover 75 diesel, I purchased her as a none runner with a broken serpentine belt / failed water pump and a few other items needing TLC. She now runs, holds her coolant and the engine runs well. My problem is it runs in limp mode with a fault code of 0220 showing on the TOAF software. I have changed the potentiometer and tried to program the replacement to the main ECU to no avail. Not sure what I’m doing wrong, any suggestions or instructions would be gratefully appreciated. The code and detail that TOAF throws up is the following:
0220 Accelerator Potentiometer PGS
Errors Count 1
Error Present
Error 1
Engine speed 1498.50/min
Supply Voltage 14.7
Position Pedal Travel Sensor: 0.00%
Driving Speed 0.00 kh/h

[marinabrian]

A replacement throttle demand pedal does not require coding to the car ;)

Is your car fitted with the early type pedal with a bell crank link to a twin potentiometer, or is it the later thick film hybrid?

Brian :D

[Mickyboy]

I bet it’s the later type sold quite a few.
Mick

[Adrian1961]

Brian, I forgot to mention its an auto, the potentiometer is a Bosch Unit, with a six lead connection block ( and a real ****** to remove ) part number is 0 281 002 310 / 191400148/SLC 100 180

[Adrian1961]

Still trying to sort out my potentiometer / accelerator problem, have an error code still showing 0220 and running in limp mode, the vehicle is a 2002 75 Connie auto with the potentiometer being a Bosch unit with Part no.0281002310 / SLC100180, I can’t find a wiring diagram or any reference to voltages I could test on the six-wire connector block, even some ideas on what can throw the ECU into limp mode would help. Can anyone steer me in any direction? :shrug:

[marinabrian]

Still trying to sort out my potentiometer / accelerator problem, have an error code still showing 0220 and running in limp mode, the vehicle is a 2002 75 Connie auto with the potentiometer being a Bosch unit with Part no.0281002310 / SLC100180, I can’t find a wiring diagram or any reference to voltages I could test on the six-wire connector block, even some ideas on what can throw the ECU into limp mode would help. Can anyone steer me in any direction? :shrug:

This is the wiring between the throttle pedal and the ECM

https://the75andztclub.co.uk/forum/attachment.php?attachmentid=72433&stc=1&d=1519163366

Brian :D

[Adrian1961]

This is the wiring between the throttle pedal and the ECM

https://the75andztclub.co.uk/forum/attachment.php?attachmentid=72433&stc=1&d=1519163366

Brian :D
Thanks Brian, is it only to the ECM, should I be looking for a stand alone six pin connector block direct to the ECM or will it be part of a multi plug carrying additional wires / inputs to the ECM. :}

[marinabrian]

Thanks Brian, is it only to the ECM, should I be looking for a stand alone six pin connector block direct to the ECM or will it be part of a multi plug carrying additional wires / inputs to the ECM. :}

It's the biggest of the multiplugs on the ECM, IIRc the one in the middle ;)

[Adrian1961]

It's the biggest of the multiplugs on the ECM, IIRc the one in the middle ;)

Thank you Brian, I'll check it out and take out the ECM completly and give it a light pressure blowout with the airline, the car has stood for the best part of 3 to 4 years before I started to repair her so may indeed be a bad connection on the plug, I'll keep you up todate. :}

[COLVERT]

Is there a list of different faults that can make the engine go into LIMP mode ?----:shrug:---Things other than the pedal potentiometer ??

[Mickyboy]

If I remember correctly I came across a problem when the wiring at the fuel rail pressure sensor was at fault, and that sent the car into limp mode,
Car in question was a Rover 75 cdti 2003 model

Mick

[Adrian1961]

Thanks Mick, I’ll check that out when it gets a little warmer, you may have hit the nail on the head, after the car has been running for half an hour and gets up to temperature it wont start again for another 5 to 10 min but won’t throw up an error code when interrogated. Then again, I suppose when a vehicle has stood for 3 -4 years its going to be temperamental.