VOLVO
ECM-P120F00 - Fuel Pressure Regulator Excessive Variation. 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 how the fuel pressure control valve works. The code is set when the fuel pressure the valve produces does not match the requested fuel pressure.
Possible causes
- Loose connections
- Open circuit in the power supply
- Open circuit in the signal wire
- Signal wire shorted to ground or voltage
- Damaged fuel pressure control valve
What you can do
- 1Read and note the code, clear it and road test to see whether it returns
- 2Check the connections at the fuel pressure control valve for looseness
- 3Use a multimeter to check that the wires to the valve are not broken and have no contact with ground or battery positive
- 4If you have a diagnostic tool: read the fuel pressure in live data and compare it with the requested pressure
- 5If you find no fault: have a workshop check or replace the fuel pressure control valve
Symptoms you may notice2
- Poor performance and lack of power while driving
- Text message and warning symbol in the display
General guidance for car owners. Diagnosis on the car can point to a different cause.