P0175 System Too Rich (Bank 2)
What does P0175 mean?
P0175 — System Too Rich (Bank 2) (bank 2). This is an OBD-II diagnostic trouble code a scanner retrieves when your vehicle's computer detects system too rich (bank 2) on bank 2. The level of risk depends on how the vehicle is currently running and how long you've been driving with the light on.
Common causes of P0175
- Leaking or stuck-open fuel injectors on bank 2
- MAF sensor over-reporting airflow
- Restricted air intake
- Faulty bank 2 oxygen sensor
- Fuel pressure regulator issue
How to fix P0175
- Compare bank-to-bank fuel trims with an OBD-II scanner
- Test bank 2 injectors for leakage and even spray pattern
- Verify MAF airflow readings and air filter condition
- Check fuel pressure and regulator operation
- Replace the bank 2 O2 sensor if it reads rich when engine is normal