Diagnostic trouble code (DTC) information
WARNING: This page is about a different car, the 2004 Volvo S40, 2003 Volvo S40, 2002 Volvo S40, 2001 Volvo S40, and 2000 Volvo S40. However, it is still accessible from the selected car via links, so may be relevant.
Condition
The catalytic converter's effectiveness is checked once per driving cycle. The control module forces a changed cycling of the front heated oxygen sensor. If the catalytic converter's effectiveness is reduced, the rear heated oxygen sensor's signal will change and trouble code ECM-5A is generated.
Substitute Value
- None.
Possible Source
- Uneven compression.
- Air leakage in the intake system.
- Leakage in the exhaust system.
- Defective fuel pressure.
- Damaged catalytic converter.
Fault symptom[s]
- Poor performance