P0420 Chevy HHR

This page is meant to help you troubleshoot the Chevy HHR P0420 trouble code. It covers Chevy HHR P0420 meaning, symptoms, causes, and possible solutions. In the HHR, OBDII P0420 is often caused by a bad oxygen sensor, but there can be other causes as well. One of the most common trouble codes with all … Read more

P0171 Chevy HHR

One of the most common trouble codes with the Chevy HHR is the P0171 code. This code number references a number that is given to you when you plug your car into a OBDII scanner.   P0171: Fuel Trim System Lean Bank 1 HHR P0171 Code Defined P0171 is an OBDII trouble code. The code … Read more