VOLVO
ECM-P227300 - O2 Sensor Signal Stuck Rich - Bank 2, Sensor 2. 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–)2007Engine B8444S only
- Volvo S80 (2007–)2008–2010Engine 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–)2008–2010Engine 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 (ECM) continuously monitors the voltage from the rear heated oxygen sensor on bank 2, which is the rear cylinder row beside the passenger compartment, with cylinders 2, 4, 6 and 8. The code is set when the voltage falls outside the permitted range, and the signal has stuck in the rich position.
Possible causes
- Signal wire shorted to supply voltage
What you can do
- 1Start the engine, let it idle for a while, and then read the status of the code
- 2Use a multimeter to check that the signal wire is not shorted to supply voltage
- 3Check the connectors to the rear oxygen sensor on bank 2 for contact resistance and oxidation
- 4If the wiring is in order, try a new rear oxygen sensor
- 5If the fault remains, have a workshop diagnose further
Symptoms you may notice1
- Malfunction indicator lamp (MIL) lit
What the fault can affect1
- Rear oxygen sensor control is switched off
General guidance for car owners. Diagnosis on the car can point to a different cause.