P019C
O2 Sensor Delayed Response Rich to Lean Bank 2 Sensor 3
Generic OBD-II
Common symptoms
What you'll notice
- Check and clean the O2 sensor on bank 2 sensor 3
- Replace the O2 sensor on bank 2 sensor 3 with a new one
- Inspect and repair any exhaust leaks on bank 2 sensor 3
- Check the wiring and connections related to bank 2 sensor 3 for any damages or loose connections
- Perform an engine tune
- up to ensure proper fuel
- air mixture on bank 2 sensor 3
Common causes
Most likely first
- Faulty oxygen sensor in bank 2 sensor 3
- Clogged or dirty fuel injectors
- Vacuum leak in the intake manifold
- Malfunctioning catalytic converter in bank 2
- Issue with the engine control module (ECM)
How to diagnose & fix
Work through it in order
- Check engine light comes on
- Decreased fuel efficiency
- Engine misfires or stalls
- Rough idle or hesitation
- Increased emissions
Related codes
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