VOLVO
ECM-P005100 - HO2S Heater Control Circuit Low (Bank 2, Sensor 1). General Failure Information. No sub type information
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 (13)
- Volvo S80 (2007–)2007–2010Engine B6324S, B8444S only
- Volvo S80 (2007–)2011Engine B6324S5, B8444S only
- Volvo S80 (2007–)2012–2015Engine B6324S5 only
- Volvo V70 (2008–)2008–2010Engine B6324S only
- Volvo V70 (2008–)2011–2014Engine B6324S5 only
- Volvo XC60 (2009–)2010Engine B6324S only
- Volvo XC60 (2009–)2011–2015Engine B6324S5 only
- Volvo XC70 (2008–)2008–2010Engine B6324S only
- Volvo XC70 (2008–)2011–2015Engine B6324S5 only
- Volvo XC90 (2003–)2005–2006Engine B8444S only
- Volvo XC90 (2003–)2007–2010Engine B6324S, B8444S only
- Volvo XC90 (2003–)2011Engine B6324S5, B8444S only
- Volvo XC90 (2003–)2012–2014Engine B6324S5 only
What does this fault code mean?
The engine control module checks the preheating circuit of the front oxygen sensor on bank 2, which is the back cylinder row beside the cabin, namely cylinders 2, 4, 6 and 8. The code is set when the circuit is short-circuited to ground or has an open circuit.
Possible causes
- Open circuit in the power supply lead
- The power lead is short-circuited to ground
- Damaged front heated oxygen sensor
What you can do
- 1Read the fault status with a diagnostic tool once the diagnostic is complete. A status of Fault found means the fault is present now
- 2Make sure the fuses are intact. Their locations are given in the instruction manual or on the fuse chart
- 3Check the connector on the front oxygen sensor for bank 2 for loose contacts and oxidation. Rust solvent spray and grease do not belong in the connector
- 4With a multimeter, check that the sensor's power lead is not short-circuited to ground and has no open circuit
- 5Replace the front oxygen sensor if the fault remains after checking the connector and wiring
Symptoms you may notice1
- The malfunction indicator lamp lights up
What the fault can affect2
- Lambda control is switched off
- Preheating of the front oxygen sensor is switched off
General guidance for car owners. Diagnosis on the car can point to a different cause.