VOLVO
ECM-P01A500 - Alternative Fuel Rail Pressure Sensor 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 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 any signal is below that lowest value. Here the code is linked to the injector on cylinder 4, and the control module then uses the value from pressure sensor 1 instead.
Possible causes
- Looseness or oxidation in the connections
- Faulty pressure sensor in the cylinder 4 injector
What you can do
- 1Read and clear the code, then start the engine to see whether it returns
- 2Check the connector to the injector on cylinder 4 for looseness and oxidation
- 3If you have a diagnostic tool: read the pressure from each injector in live data and see whether cylinder 4 is low compared with the others
- 4If the fault remains, a workshop with diagnostic equipment should check the pressure sensor in the injector on cylinder 4
Symptoms you may notice3
- Uneven idle
- The engine may stall at idle or while driving
- The Check engine lamp lights up or behaves abnormally
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.