OBD
P02A2
Cylinder 3 - Fuel Trim at Max Limit
What it means
P02A2 means Cylinder 3 - Fuel Trim at Max Limit.
Check these first
- Cylinder 3 running lean, so the ECM trims to the max
- Clogged or dirty cylinder 3 injectors
- A faulty bank 1 sensor 1 oxygen sensor
- A dirty or faulty mass airflow sensor
- Intake vacuum leaks feeding cylinder 3 unmetered air
What to do next
- Read fuel trims and check live data
- Clean or test the mass airflow sensor
- Check for intake vacuum leaks
- Run an injector balance test on cylinder 3
- Check the bank 1 sensor 1 oxygen sensor
- Clear the code and retest
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Updated
Generic SAE J2012 definition. Last updated 2026-10-10.