Same as P2097 for Bank 2 — post-cat fuel trim indicates a persistently rich condition.
SYMPTOMS
- Check-engine light
- Possible rough idle
LIKELY CAUSES
- Failing downstream O2 sensor
- Fuel delivery issue
- Leaking injector
DIAGNOSIS STEPS
- Check downstream O2 data
- Verify fuel pressure and trims
- Inspect for injector leakage
RELATED PARTS
- Rear O2 sensor (Bank 2)