What does fault code ECM-P212529 mean?

Diagnostic fault code details for ECM-P212529 (Volvo S60 (2011–), Volvo S80 (2007–), Volvo S80 (2007–)). Repair service at OBD Tuning.

VOLVO

ECM-P212529 - Throttle/Pedal Position Sensor/Switch E Circuit. General Signal Failures. Signal signal invalid

System

Engine Control Module (ECM)

Volvo models this fault code applies to

Applies to the following models:

3 models

S60 (2011–), S80 (2007–), V70 (2008–)

Show models by year and engine (9)

What does this fault code mean?

The engine control module (ECM) has been alerted by the central electronic module (CEM) saying that the accelerator pedal signal is invalid. The fault may lie in the accelerator pedal signal or in the CAN communication between CEM and ECM. This is a follow-on code: the root fault is in CEM, and this code can only be erased once the fault there has been fixed.

Possible causes

Fault in the central electronic module (CEM)
Fault in the CAN communication between CEM and the engine control module

What you can do

1Read the fault codes in the central electronic module (CEM) first, since the root fault is there
2Troubleshoot and fix the CEM faults as needed, starting with the fuses and connectors that belong to it
3Erase the code in the engine control module only after the CEM faults are gone, then road test the car to check that it does not return
4If you have a diagnostic tool, read the accelerator pedal position in live data while pressing and releasing the pedal, and check that the value follows the movement smoothly

Symptoms you may notice2

Poor response from the accelerator pedal
Cruise control does not work at all

What the fault can affect1

The accelerator pedal stops responding completely when the brake pedal is pressed

General guidance for car owners. Diagnosis on the car can point to a different cause.