VOLVO
ECM-P251000 - ECM / PCM Power Relay Sense Circuit Range/Performance. General Failure Information. No sub type information
System
Engine Control Module (ECM)
Volvo models this fault code applies to
Applies to the following models:
3 modelsS60 (2011–), S80 (2007–), V70 (2008–)
Show models by year and engine (9)
- Volvo S60 (2011–)2011–2012Engine B5254T5 only
- Volvo S80 (2007–)2007–2008Engine B5254T6 only
- Volvo S80 (2007–)2009Engine B5254T6, B5254T8 only
- Volvo S80 (2007–)2010–2011Engine B5254T10, B5254T11, B5254T8 only
- Volvo S80 (2007–)2012Engine B5254T10 only
- Volvo V70 (2008–)2008Engine B5254T6 only
- Volvo V70 (2008–)2009Engine B5254T6, B5254T8 only
- Volvo V70 (2008–)2010–2011Engine B5254T10, B5254T11 only
- Volvo V70 (2008–)2012Engine B5254T10 only
What does this fault code mean?
The ECM checks the feed that comes from the system relay. Possible causes are a faulty charging system, poor contact in the connections or a damaged system relay. The fuel injectors are then shut off, so the engine will not fire even with the starter turning.
Possible causes
- Faulty charging system
- Contact resistance in the connections
- Damaged system relay
What you can do
- 1Check the battery voltage and condition
- 2Check that the generator charges the battery when the engine is running
- 3Use a multimeter to check that the power cable to the system relay has no open circuit
- 4If no fault is found in the checks above, a new system relay can be tried
- 5Have a workshop check the connectors on the engine control module and the system relay if the fault remains
Symptoms you may notice1
- The starter turns over but the engine fails to start
What the fault can affect1
- The injectors are shut off
General guidance for car owners. Diagnosis on the car can point to a different cause.