VOLVO
ECM-P120100 - Cylinder #1 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 engine control module (ECM) monitors the integrated output stages for the injectors and how long the injectors are open. The fourth digit of the code shows which of cylinders 1 to 4 the fault applies to. The code is set when the injection time is incorrect.
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
- 1Read and note the code, clear it and road test to see whether it returns
- 2Check that the fuses are intact
- 3Check the connector to the injector for the cylinder the code points to, for contact resistance and oxidation
- 4Use a multimeter to check that the wire to the injector is not broken and has no contact with ground or battery positive
- 5If you have a diagnostic tool: activate the injector for the relevant cylinder and check that it operates
- 6If 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.