Diagnostic Trouble Code (DTC) Information

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