VOLVO
ECM-P055C00 - Engine Oil Pressure Sensor/Switch "B" Circuit Low. General Failure Information. No sub type information
System
Engine Control Module (ECM)
Volvo models this fault code applies to
Applies to the following models:
8 modelsS60 (2011–), S80 (2007–), V40 (2013–), V40 Cross Country (2013–), V60 (2011–), V70 (2008–), XC60 (2009–), XC70 (2008–)
Show models by year and engine (8)
- Volvo S60 (2011–)2014–2015Engine B4204T10, B4204T11, B4204T12, B4204T15, B4204T9, D4204T5 only
- Volvo S80 (2007–)2014–2015Engine B4204T11, B4204T12, B4204T15, D4204T5 only
- Volvo V40 (2013–)2015Engine B4204T11, D4204T14 only
- Volvo V40 Cross Country (2013–)2015Engine B4204T11, D4204T14 only
- Volvo V60 (2011–)2014–2015Engine B4204T11, B4204T12, B4204T15, B4204T9, D4204T5 only
- Volvo V70 (2008–)2014–2015Engine B4204T11, D4204T5 only
- Volvo XC60 (2009–)2014–2015Engine B4204T10, B4204T11, B4204T12, B4204T15, B4204T9, D4204T5 only
- Volvo XC70 (2008–)2014–2015Engine B4204T11, D4204T5 only
What does this fault code mean?
The ECM reads oil pressure through the combined oil pressure and oil temperature sensor. The fault is stored when the signal from the oil pressure sensor is too low while the engine is running. The module then uses a fixed oil pressure value instead of the measured one.
Possible causes
- Open circuit or short circuit in the wiring to the sensor
- The combined oil pressure and oil temperature sensor is damaged
What you can do
- 1Check that the fuses are intact
- 2Check the connections at the sensor and the control module for loose or corroded terminals
- 3Use a multimeter to check that the wiring from the sensor has no open circuit and is not shorted to ground
- 4If you have diagnostic equipment: read the oil pressure in live data with the engine running and check whether the value stays at an unrealistically low level
- 5Clear the code and road test the car. If the wiring and connections are sound, have a workshop check the combined sensor
Symptoms you may notice1
- No noticeable symptoms for the driver
What the fault can affect1
- The control module uses a fixed oil pressure instead of the measured value
General guidance for car owners. Diagnosis on the car can point to a different cause.