P0175 – System Too Rich (Bank 2)

Meaning:

When there's too little oxygen in the exhaust, the P0175 code is triggered
The P0175 is triggered when there’s too little oxygen in the exhaust

There’s a rich condition in bank 2; i.e. there’s too little oxygen in the exhaust.

Main Symptoms:

Generally doesn’t come with symptoms but the Check Engine Light may come on and engine may misfire

Possible Causes:

  • Dirty or defective MAF sensor
  • MAF sensor has a vacuum leak
  • Problem relating to fuel pressure or delivery

Diagnostic Steps:

  • Inspect MAF sensor in bank 2 for dirt and debris
  • Check whether fuel pressure is correct
  • Inspect fuel lines and injectors for any leaks/openings and dirt
  • Check vacuum, PCV and exhaust for leaks
  • Run a smog test using OBD2 scanner

Read More: OBD2 Codes List: Meaning, Fixes, and Free Download