Diagnostic trouble code (DTC) information
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