OBD-II code guide
P0175 System Too Rich Bank 2
P0175 means the engine computer is removing fuel because bank 2 is running too rich.
What it means
Bank 2 has more fuel or less air than expected for normal combustion.
Common symptoms
- Poor fuel economy
- Black smoke
- Fuel smell
- Rough idle
- Check engine light
Likely causes
- Leaking injector
- Faulty MAF data
- High fuel pressure
- Oxygen sensor signal issue
- Restricted air intake
First checks
- Check for black smoke or fuel smell.
- Review fuel trims for both banks.
- Inspect air filter and intake path.
- Do not replace oxygen sensors before checking rich causes.