VOLVO
ECM-P2A0017 - O2 Circuit Range / Performance (Bank 1, Sensor 1). General Electrical Failures. Circuit voltage above threshold
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?
Even though the code is named high voltage, it concerns current in the pump circuit of the oxygen sensor when the sensor is cold. The engine control module (ECM) sets the code if it finds current there, that is leakage current or flashover, and this happens at engine start.
Possible causes
- Short circuit or flashover in the pump circuit wiring
- Damaged oxygen sensor
What you can do
- 1Read the code with a diagnostic tool and check whether it is active or only stored
- 2Start the engine and read the fault status; if the code is not active, the fault may have disappeared temporarily
- 3Look for chafed, damp or burnt wiring at the oxygen sensor that could cause a flashover
- 4Have a workshop check the oxygen sensor, since it may be damaged
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.