Question

What is P0172 for a 2005 Pontice Vibe 4.1L?

Answer 1

Hi there,

This code is for a rich fuel mixture on bank 1. This can be caused by several things, most commonly if you don't have a misfire is one of the O2 sensors on bank 1. You need a scan tool that can read the live data to check the sensors to determine if one is failing.

Answer 2

P0172 PONTIAC - Fuel Trim System Rich Bank 1

Read more: https://www.autocodes.com/p0172_pontiac.html