VOLVO
ECM-P01A51F - Alternative Fuel Rail Pressure Sensor Circuit Low. General Electrical Failures. Circuit intermittent
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 D4204T5 only
- Volvo S80 (2007–)2014–2015Engine D4204T5 only
- Volvo V40 (2013–)2015Engine D4204T14 only
- Volvo V40 Cross Country (2013–)2015Engine D4204T14 only
- Volvo V60 (2011–)2014–2015Engine D4204T5 only
- Volvo V70 (2008–)2014–2015Engine D4204T5 only
- Volvo XC60 (2009–)2014–2015Engine D4204T5 only
- Volvo XC70 (2008–)2014–2015Engine D4204T5 only
What does this fault code mean?
The control module (ECM) compares the signal levels from the four pressure sensors in the injectors with a lowest permitted value. The code is set when a signal level falls below that value. The fault is of the intermittent type, meaning sporadic, and it may not show up when you check the car.
Possible causes
- Poor contact or oxidation in the connections
- Faulty pressure sensor in one of the injectors
What you can do
- 1Check the injector connectors for looseness and oxidation
- 2Read and clear the code, then start the engine to see whether it returns
- 3If you have a diagnostic tool: read the pressure from each injector in live data and see whether any one is clearly low compared with the others
- 4If the fault remains, a workshop with diagnostic equipment should check the pressure sensors in the injectors
Symptoms you may notice2
- Uneven idle
- The engine may stall, both at idle and while driving
What the fault can affect1
- The value from pressure sensor 1 is used instead
General guidance for car owners. Diagnosis on the car can point to a different cause.