What does fault code ECM-P268012 mean?

Diagnostic fault code details for ECM-P268012 (Volvo S60 (2011–), Volvo S60 (2011–), Volvo S80 (2007–)). Repair service at OBD Tuning.

VOLVO

ECM-P268012 - Coolant Degassing Valve Control Circuit High. General Electrical Failures. Circuit short to battery

System

Engine Control Module (ECM)

Volvo models this fault code applies to

Applies to the following models:

6 models

S60 (2011–), S80 (2007–), V40 (2013–), V40 Cross Country (2013–), V60 (2011–), V70 (2008–)

Show models by year and engine (11)

What does this fault code mean?

The engine control module (ECM) drives the solenoid for the Degas valve, which regulates engine temperature more efficiently. The code is set when the signal is higher than a set level as the solenoid is activated. The cause may be a signal wire shorted to supply voltage, a damaged solenoid, a damaged connector or the engine control module.

Possible causes

Signal wire shorted to supply voltage
Damaged solenoid
Damaged connector
Damaged engine control module (ECM)

What you can do

1Check that the fuse for the solenoid has not blown
2Use a multimeter to check that the signal wire to the solenoid has no contact with the positive supply
3Check the connector at the solenoid for damage
4If you have a diagnostic tool: read the control signal to the solenoid in live data when it is activated
5If nothing is found, have a workshop with diagnostic equipment decide whether the fault lies in the solenoid or the engine control module

Symptoms you may notice2

Air conditioning does not work
Heater does not work

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