OBD
P2180
System Too Rich Off Idle Bank 2
What it means
P2180 means System Too Rich Off Idle Bank 2.
Check these first
- A faulty oxygen sensor on bank 2
- A mass airflow sensor fault
- A leaking or dirty fuel injector on bank 2
- A failed fuel pressure regulator
- A restricted air filter or carbon buildup
What to do next
- Read the fuel trims on bank 2 on a scan tool
- Check the oxygen sensor signal on bank 2
- Clean the mass airflow sensor
- Check the fuel pressure and the injectors
- Replace the fuel filter if it is restricted
- Clear the code and retest
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Updated
Generic SAE J2012 definition. Last updated 2026-10-10.