VOLVO
ECM-P01B800 - Alternative Fuel Rail Temperature Sensor Circuit Intermittent/Erratic. 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 code is set when the temperature from the injector on cylinder 4 falls below the lowest permitted value. The signal is erratic, and the control module then uses the temperature from one of the other injectors.
Possible causes
- Loose connection or oxidation in the connections
- Damaged injector on cylinder 4
What you can do
- 1If there are other codes for missing or faulty communication with the injectors, this code is a follow-on fault and those should be fixed first
- 2Check the injector connectors on cylinder 4 for looseness, oxidation and damage
- 3If you have a diagnostic tool: read the temperature from each injector in live data and see whether cylinder 4 jumps or stays low compared with the others
- 4If no fault is found in these checks, the injector on cylinder 4 may need to be replaced, which a workshop does
Symptoms you may notice1
- No noticeable symptoms for the driver
What the fault can affect1
- The temperature from one of the other injectors is used instead
General guidance for car owners. Diagnosis on the car can point to a different cause.