Possible Causes
NOTE:
Monitor description.
Detects when secondary fuelling adaptation offset is too large to maintain emissions within limits
- The engine control module detected plausibility failures
- Exhaust system leakage
- Post catalyst heated oxygen sensor incorrectly installed
- Pre catalyst heated oxygen sensor circuit short circuit to ground, short circuit to power, open circuit, high resistance
- Post catalyst heated oxygen sensor circuit short circuit to ground, short circuit to power, open circuit, high resistance
- Pre catalyst heated oxygen sensor contamination or failure
- Post catalyst heated oxygen sensor contamination or failure