VOLVO
ECM-P209800 - Post Catalyst Fuel Trim System Too Lean 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?
On bank 2 the code is set when large differences between the front and rear oxygen sensors push the rear sensor's adjustment into one of its limit positions. Although it is named too lean, the condition is the difference between the two sensors.
Possible causes
- Contact resistance, oxidation or loose contact in the connections
- Air leaking into the exhaust system
- Damaged front oxygen sensor
- Damaged rear oxygen sensor
What you can do
- 1Check the exhaust system for air leaks and remedy any leaks found
- 2Look at the connectors to the bank 2 oxygen sensors for contact resistance and oxidation
- 3Draw conclusions from other stored trouble codes before deciding which oxygen sensor to replace
- 4If the fault remains, have a workshop establish which oxygen sensor is damaged, so that the correct part 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.