VOLVO
ECM-P120300 - Cylinder #3 Injector Circuit Open/Shorted. General Failure Information. No sub type information
System
Engine Control Module (ECM)
Volvo models this fault code applies to
Applies to the following models:
2 modelsS80 (2007–), V70 (2008–)
Show models by year and engine (2)
What does this fault code mean?
The ECM monitors the injection timing for cylinder 3. The fourth digit of the code shows which of cylinders 1 to 4 it refers to, and the code is set when the injection timing is wrong.
Possible causes
- Contact resistance or oxidation in the connections
- Open circuit in the wiring
- Short circuit to supply voltage
- Damaged injector
What you can do
- 1Note which cylinder the fourth digit of the code refers to, and check the wire to that injector in particular
- 2If you have a diagnostic tool: start the engine and read the fault status for the code once the diagnosis is complete
- 3Check the connector to injector cylinder 3 for contact resistance and oxidation
- 4Use a multimeter to check that the wire to cylinder 3 is not broken and has no contact with battery positive
- 5If you find no fault: have a workshop check the injector
Symptoms you may notice2
- Poor performance and lack of power while driving
- Text message and warning symbol in the display
What the fault can affect2
- Engine speed is limited
- The car goes into limp-home mode
General guidance for car owners. Diagnosis on the car can point to a different cause.