Possible Causes
WARNING: This page is about a different car, the 2017 Jaguar XJ, 2016 Jaguar XJ, 2015 Jaguar XJ, 2014 Jaguar XJ, and 2013 Jaguar XJ. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
Monitor description
. Detects when secondary fueling adaptation offset is too small for fuel mixture control to be maintained
- 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
- Mid 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