What are the 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.

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.

P0175

System Too Rich (Bank 2)

System: Fuel and air metering (P code)
Lamp: Check Engine Light
Category: Powertrain - Fuel/Air Metering

What it means

P0175 means System Too Rich (Bank 2).

Check these first

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

What to do next

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

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Updated

Generic SAE J2012 definition. Last updated 2026-08-30.