OBD
P02C7
Cylinder 12 - Fuel Trim at Min Limit
What it means
P02C7 means Cylinder 12 - Fuel Trim at Min Limit.
Check these first
- A rich-running injector on cylinder 12
- A stuck-high fuel pressure regulator
- A slow oxygen sensor on cylinder 12
- An intake manifold gasket leaking on the bank
- Low cylinder 12 compression
What to do next
- Read live fuel trim for cylinder 12 on a scan tool
- Check fuel pressure for a high reading
- Test the oxygen sensor response time
- Check the intake manifold gaskets for leaks
- Run a compression test on cylinder 12
- Clear the code and retest
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Updated
Generic SAE J2012 definition. Last updated 2026-10-10.