VOLVO
ECM-P120312 - Cylinder #3 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 code for cylinder 3 is set when the signal to the injector is faulty. The cause is a signal wire shorted to supply voltage.
Possible causes
- Signal wire shorted to supply voltage
- Damaged injector
What you can do
- 1Note that the code applies to cylinder 3 and check the wire to that injector in particular
- 2With the engine control module connector disconnected, use a multimeter to check that the signal wire to cylinder 3 has no contact with battery positive
- 3Look for chafing on the wire where it may have touched a live source
- 4Check the injector for cylinder 3 for damage
- 5If you find no fault: have a workshop check the injector
Symptoms you may notice2
- The engine stalls on start
- A clicking sound when starting is attempted, but the engine does not start
What the fault can affect1
- Injection stops
General guidance for car owners. Diagnosis on the car can point to a different cause.