VOLVO
ECM-P209900 - Post Catalyst Fuel Trim System Too Rich Bank 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–)2008–2009Engine B8444S only
- Volvo S80 (2007–)2010Engine B6324S, B8444S only
- Volvo S80 (2007–)2011Engine B6324S5, B8444S only
- Volvo S80 (2007–)2012–2015Engine B6324S5 only
- Volvo V70 (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–)2010Engine B6324S only
- Volvo XC70 (2008–)2011–2015Engine B6324S5 only
- Volvo XC90 (2003–)2008–2010Engine B8444S only
- Volvo XC90 (2003–)2011Engine B6324S5, B8444S only
- Volvo XC90 (2003–)2012–2014Engine B6324S5 only
What does this fault code mean?
The condition for this code on bank 2 is that the rear oxygen sensor's adjustment reaches one of its limit positions after large differences from the front sensor. The code is named too rich.
Possible causes
- Contact resistance, oxidation or poor contact in the connections
- Air leakage in the exhaust system
- Damaged front oxygen sensor
- Damaged rear oxygen sensor
What you can do
- 1Check that the exhaust system does not leak air
- 2Check that the connectors to the bank 2 oxygen sensors are clean and secure
- 3See whether other trouble codes are stored, and troubleshoot those first
- 4If the fault remains, have a workshop establish which oxygen sensor is damaged before any is replaced
Symptoms you may notice2
- Malfunction indicator light (MIL) on
- Check engine warning lamp lights or behaves abnormally
General guidance for car owners. Diagnosis on the car can point to a different cause.