- P012023 Throttle/Pedal Position Sensor A Circuit. General Signal Failures. Signal stuck low
P012038 Throttle/Pedal Position Sensor A Circuit. FM (Frequency Modulated) / PWM (Pulse Width Modulated) Failures. Signal
I am getting the messages on the dash that says "Engine System Service Urgent" and "Engine System Service Required"
I pulled the accelerator pedal aassembly apart a bit and found it was completely solid state and there was nothing to clean and nothing smelled burt or anything... I assumed I needed a new pedal assembly.
I just got a new assembly on the car the other day and the ECM is still showing these messages. I'm a little frustrated and unsure of how to proceed.
VIDA doesn't provide much help except to say "check the wiring" basically.
I have the wiring diagram, which /does/ give me an indication of what wires lead where, but apart from the ground wire this is not really helpful in determining what /should/ be on each line... I can see where the pedal assembly is connected to the ECM on a particular wire, ground on another, and a set of wires connect to the CEM.
Judging from this wiring information and the pedal assembly codes I'm guessing there is some kind of fancy PWM signal directly to the ECM and a lower resolution 'backup' signal over CAN to the CEM?
Anyone who's experienced anything like this in a P3 car, or anyone else that could provide some insight - I would be very happy to hear from you!