VOLVO
ECM-P043000 - Catalyst System Efficiency Below Threshold (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–)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 code concerns the catalytic converter efficiency on bank 2. The ECM alternates the fuel mixture between rich and lean and compares the signal from the rear oxygen sensor on bank 2. The code is set when that sensor switches too quickly.
Possible causes
- Front and rear oxygen sensor installed the wrong way round
- Air leak in the exhaust system
- Damaged front oxygen sensor (bank 2)
- Damaged front catalytic converter (bank 2)
What you can do
- 1Check that the oxygen sensors on bank 2 are in the correct positions, so the front and rear have not been swapped
- 2Look for air leaks in the exhaust system, especially at joints and seams
- 3If no leak is found, have a workshop check the front oxygen sensor on bank 2
- 4If the fault remains, have a workshop judge whether the front catalytic converter on bank 2 is damaged
Symptoms you may notice1
- The malfunction indicator lamp (MIL) is lit
General guidance for car owners. Diagnosis on the car can point to a different cause.