VOLVO
ECM-P209600 - Post Catalyst Fuel Trim System Too Lean Bank 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:
10 modelsS60 (2011–), S80 (2007–), V40 (2013–), V40 Cross Country (2013–), V60 (2011–), V60 Cross Country (2015–), V70 (2008–), XC60 (2009–), XC70 (2008–), XC90 (2003–)
Show models by year and engine (44)
- Volvo S60 (2011–)2011Engine B4164T, B4164T3, B5254T5, B6304T4 only
- Volvo S60 (2011–)2012Engine B4164T, B4164T2, B4164T3, B5254T5, B6304T4 only
- Volvo S60 (2011–)2013All engines except: B4204T7, D4162T, D5204T3, D5204T7, D5244T11, D5244T15
- Volvo S60 (2011–)2014All engines except: B4204T7, D4162T, D4204T5, D5204T3, D5204T7, D5244T11, D5244T15
- Volvo S60 (2011–)2015All engines except: D4162T, D4204T5, D5204T3, D5204T7, D5244T11, D5244T15, D5244T23
- Volvo S80 (2007–)2007Engine B5254T6 only
- Volvo S80 (2007–)2008Engine B5254T6, B6304T2, B8444S only
- Volvo S80 (2007–)2009Engine B5254T6, B5254T8, B6304T2, B8444S only
- Volvo S80 (2007–)2010Engine B5254T10, B5254T11, B5254T8, B6304T2, B6324S, B8444S only
- Volvo S80 (2007–)2011Engine B4164T, B5254T10, B5254T11, B5254T8, B6304T4, B6324S5, B8444S only
- Volvo S80 (2007–)2012Engine B4164T, B4164T2, B5254T10, B6304T4, B6324S5 only
- Volvo S80 (2007–)2013Engine B4164T, B4164T2, B5254T12, B5254T14, B6304T4, B6324S5 only
- Volvo S80 (2007–)2014Engine B4164T, B4164T2, B4204T11, B4204T12, B4204T15, B5254T12, B5254T14, B6304T4, B6324S5 only
- Volvo S80 (2007–)2015All engines except: B6324S4, D4162T, D4204T5, D5204T3, D5244T15
- Volvo V40 (2013–)2013–2014All engines except: D4162T, D5204T4, D5204T6
- Volvo V40 (2013–)2015All engines except: D4162T, D4204T14, D5204T6
- Volvo V40 Cross Country (2013–)2013–2014All engines except: D4162T, D5204T4, D5204T6
- Volvo V40 Cross Country (2013–)2015All engines except: D4162T, D4204T14, D5204T6
- Volvo V60 (2011–)2011Engine B4164T, B4164T3, B6304T4 only
- Volvo V60 (2011–)2012Engine B4164T, B4164T2, B4164T3, B6304T4 only
- Volvo V60 (2011–)2013Engine B4164T, B4164T2, B4164T3, B5204T8, B5204T9, B6304T4 only
- Volvo V60 (2011–)2014All engines except: B4204T7, D4162T, D4204T5, D5204T3, D5204T7, D5244T11, D5244T12, D5244T15, D5244T17, D82PHEV
- Volvo V60 (2011–)2015All engines except: D4162T, D4204T5, D5204T3, D5204T7, D5244T11, D5244T12, D5244T15, D5244T17, D5244T23, D82PHEV, D87PHEV
- Volvo V60 Cross Country (2015–)2015
- Volvo V70 (2008–)2008Engine B5254T6, B6304T2 only
- Volvo V70 (2008–)2009Engine B5254T6, B5254T8, B6304T2 only
- Volvo V70 (2008–)2010Engine B5254T10, B5254T11, B6304T2, B6324S only
- Volvo V70 (2008–)2011Engine B4164T, B5254T10, B5254T11, B6304T4, B6324S5 only
- Volvo V70 (2008–)2012Engine B4164T, B4164T2, B5254T10, B6304T4, B6324S5 only
- Volvo V70 (2008–)2013Engine B4164T, B4164T2, B5204T9, B6304T4, B6324S5 only
- Volvo V70 (2008–)2014Engine B4164T, B4164T2, B4204T11, B5204T9, B6304T4, B6324S5 only
- Volvo V70 (2008–)2015Engine B4164T, B4164T2, B4204T11, B5204T9, B6304T4 only
- Volvo XC60 (2009–)2009Engine B6304T2 only
- Volvo XC60 (2009–)2010Engine B6304T2, B6324S only
- Volvo XC60 (2009–)2011–2013Engine B6304T4, B6324S5 only
- Volvo XC60 (2009–)2014Engine B4204T10, B4204T11, B4204T12, B4204T15, B4204T9, B6304T4, B6324S5 only
- Volvo XC60 (2009–)2015Engine B4204T10, B4204T11, B4204T12, B4204T15, B4204T9, B5204T9, B5254T12, B5254T14, B6304T4, B6324S5 only
- Volvo XC70 (2008–)2009Engine B6304T2 only
- Volvo XC70 (2008–)2010Engine B6304T2, B6324S only
- Volvo XC70 (2008–)2011–2013Engine B6304T4, B6324S5 only
- Volvo XC70 (2008–)2014–2015Engine B4204T11, B6304T4, 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?
Although the code is named lean mixture, it concerns differences in the mixture between the front and rear oxygen sensors, in either direction. The engine control module (ECM) compares the sensors' adaptation values, and the fault may lie in the front or the rear heated oxygen sensor circuit.
Possible causes
- Leakage in the exhaust system
- Air leakage in the exhaust system
- Air getting into the exhaust manifold ahead of the catalytic converter
- Damaged front heated oxygen sensor
- Damaged rear heated oxygen sensor
- Contact resistance, oxidation or loose connections
What you can do
- 1Check the exhaust system for leaks, both before and after the catalytic converter, and remedy any leak
- 2Check the connectors to the two oxygen sensors for contact resistance and oxidation
- 3See whether other trouble codes are stored and troubleshoot those first, so that no sensor is replaced unnecessarily
- 4If the fault remains, have a workshop establish which oxygen sensor is damaged before any is replaced
- 5If a workshop finds an internal fault in the engine control module, the module must be replaced
Symptoms you may notice2
- Malfunction indicator light (MIL) on
- Check engine warning lamp lights or behaves abnormally
What the fault can affect2
- Heated oxygen sensor control is switched off
- Catalytic converter diagnostics are switched off
General guidance for car owners. Diagnosis on the car can point to a different cause.