Question

Done a code search on my vehicle and it came back P0172, P0175, and P0300 it is a 2002 Chevrolet

Answer 1

Hi there,

These are rich mixture codes, and a multiple misfire code. You need to determine the cause of the misfiring to determine if there is actually any issue with the sensors. It is likely throwing the rich codes because the fuel isn't burning.

Answer 2

P0172 CHEVROLET - Fuel Trim System Rich Bank 1
Read more: https://www.autocodes.com/p0172_chevrolet.html

P0175 CHEVROLET - Fuel Trim System Rich Bank 2
Read more: https://www.autocodes.com/p0175_chevrolet.html

P0300 CHEVROLET - Cylinder Misfire Detected Random Cylinders
Read more: https://www.autocodes.com/p0300_chevrolet.html