What does fault code ECM-P120111 mean?

Diagnostic fault code details for ECM-P120111 (Volvo C30 (2007–2013), Volvo C70 (2006–2013), Volvo C70 (2006–2013)). Repair service at OBD Tuning.

VOLVO

ECM-P120111 - Cylinder #1 Injector Circuit Open/Shorted. General Electrical Failures. Circuit short to ground

System

Engine Control Module (ECM)

Volvo models this fault code applies to

Applies to the following models:

13 models

C30 (2007–2013), C70 (2006–2013), S40 (2004–2013), S60 (2011–), S80 (2007–), V40 (2013–), V40 Cross Country (2013–), V50 (2004–2013), V60 (2011–), V70 (2008–), XC60 (2009–), XC70 (2008–), XC90 (2003–)

Show models by year and engine (46)

What does this fault code mean?

The engine control module (ECM) monitors the signal to the injectors. The code is set when the signal to an injector is incorrect, because the signal wire is shorted to ground. The fault applies to the cylinder the code points to.

Possible causes

Short circuit between the signal wires
The signal wire is shorted to ground

What you can do

1Read the code and note which cylinder the fourth digit refers to, so you check the right wire
2With the ignition on and the engine control module connector disconnected, use a multimeter to check that the wires to the relevant injector are not shorted to each other or to ground
3Inspect the signal wire for chafing and pinching, especially where it runs close to the body
4Check that the injector connectors are firmly seated and free from oxidation
5If you have a diagnostic tool: activate the injector and check that it operates
6If you find no fault in the wiring: have a workshop check the injectors

Symptoms you may notice4

The engine does not start, either occasionally or all the time
The engine stalls on start
Poor performance and lack of power while driving
A clicking sound, or no sound at all, when starting is attempted

What the fault can affect1

Injection stops

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