Thread: Check Engine light keeps coming on
View Single Post
  #10  
Old 05-14-2011, 01:30 PM
HummerJim's Avatar
HummerJim HummerJim is offline
Hummer Authority
  
Join Date: Jun 2005
Location: Key Largo
Posts: 1,174
HummerJim is an unknown quantity at this point
Default Re: Check Engine light keeps coming on
Autozone will read your codes for free. I had a similar problem with my old H3 and it turned out to be the pre cat O2 sensor. There is a history and some old threads about the gas caps going bad and giving the check engine light. I'll see if I can find you the link. I have the GT1 diagnostic software for my laptop and the Hummer plug in and I love it. You can use it on all domestic cars and BMWs, Porsches and Mercedes if you get the proper cables and plugs.
Last edited by HummerJim : 05-14-2011 at 01:33 PM.
Reply With Quote