VOLVO
ECM-P2A0024 - O2 Circuit Range / Performance (Bank 1, Sensor 1). General Signal Failures. Signal stuck high
System
Engine Control Module (ECM)
Volvo models this fault code applies to
Applies to the following models:
5 modelsS80 (2007–), V70 (2008–), XC60 (2009–), XC70 (2008–), XC90 (2003–)
Show models by year and engine (6)
- Volvo S80 (2007–)2007–2009Engine D5244T4, D5244T5 only
- Volvo V70 (2008–)2008–2009Engine D5244T4, D5244T5 only
- Volvo XC60 (2009–)2009All engines except: B6304T2
- Volvo XC70 (2008–)2008All engines except: B6324S
- Volvo XC70 (2008–)2009Engine D5244T4, D5244T5 only
- Volvo XC90 (2003–)2013–2014Engine D5244T18, D5244T5 only
What does this fault code mean?
The code means that the oxygen sensor signal on bank 1, sensor 1 stays constantly high. The engine control module (ECM) calculates the sensor temperature from its internal resistance and sets the code when the value is incorrect.
Possible causes
- Open circuit in the signal wire
- Damaged oxygen sensor
- Internal fault in the ECM
What you can do
- 1Read the code with a diagnostic tool and check whether it is active or only stored
- 2Check that the connector to the oxygen sensor is secure and free from oxidation
- 3Use a multimeter to check that the signal wire from the sensor has no break
- 4With a diagnostic tool, compare the oxygen sensor value in live data with the engine running and see whether it changes
- 5Have a workshop check the oxygen sensor and the engine control module if the fault remains
Symptoms you may notice1
- No noticeable symptoms for the driver
General guidance for car owners. Diagnosis on the car can point to a different cause.