Post Catalyst Fuel Trim System Too Rich Bank 2

Check these first

• A leaking bank 2 fuel injector
• A rich bank 2 air/fuel mixture
• A faulty bank 2 post-catalyst oxygen sensor
• An exhaust leak ahead of the bank 2 post-catalyst sensor

What to do next

1. Read the bank 2 post-catalyst fuel trim on a scan tool
2. Test the bank 2 injectors for leaks
3. Check bank 2 fuel pressure and the regulator
4. Inspect the bank 2 exhaust for leaks ahead of the sensor
5. Replace the bank 2 post-catalyst oxygen sensor if the mixture tests good
6. Clear the code and retest

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