VOLVO
ECM-P120112 - Cylinder #1 Injector Circuit Open/Shorted. General Electrical Failures. Circuit short to battery
System
Engine Control Module (ECM)
Volvo models this fault code applies to
Applies to the following models:
5 modelsS80 (2007–), V70 (2008–), XC60 (2009–), XC70 (2008–), XC90 (2003–)
Show models by year and engine (8)
- Volvo S80 (2007–)2007–2009Engine D5244T4, D5244T5 only
- Volvo S80 (2007–)2010–2011Engine D4164T only
- Volvo V70 (2008–)2008–2009Engine D5244T4, D5244T5 only
- Volvo V70 (2008–)2010–2011Engine D4164T only
- Volvo XC60 (2009–)2009All engines except: B6304T2
- Volvo XC70 (2008–)2008All engines except: B6324S
- Volvo XC70 (2008–)2009Engine D5244T4, D5244T5 only
- Volvo XC90 (2003–)2013–2014Engine D5244T18, D5244T5 only
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, which happens because the signal wire is shorted to supply voltage. The fault applies to the cylinder the code points to.
Possible causes
- Signal wire shorted to supply voltage
- Damaged injector
What you can do
- 1Note which cylinder the fourth digit of the code refers to, so you check the right wire
- 2With the engine control module connector disconnected, use a multimeter to check that the signal wire to the injector has no contact with battery positive
- 3Inspect the wire for chafing and pinching where it may have touched a live source
- 4Check the injector for damage and the connectors for oxidation
- 5If you find no fault: have a workshop check the injectors
Symptoms you may notice4
- The engine does not start, either occasionally or all the time
- Poor performance and lack of power while driving
- The engine stalls on start
- 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.