Help - 2005 XC70 Check Engine Light On

[benbenvolvo]

Folks - need your help. Today the check engine light came on in my 2005 XC70. My wife wanted to run to the dealer, but, I stopped her (as I've been down that road before). Any common causes that I could fix myself? Any way for me to tell what is causing it w/o forking over lots of cash? Any help is appreciated! thanks

[Astro14]

Take it to the local Advance Auto parts - they'll read it for free and reset it, if it's one of the common codes, and not a proprietary one...one common cause that takes no action to correct is a loose gas cap.

IF something is wrong, then that light is coming back on...be prepared for that...and a code is fault detection only, not diagnosis...so don't go throwing parts at it. There are several hundred codes. Guessing about it on the internet is pointless...

[JRL]

(sigh)
Becoming very common lately on all the threads.
Are we all mind readers?

[benbenvolvo]

Thanks folks... I took it to my local auto parts store, they read the code and it was a short in the ambient air sensor wiring (that I think I caused when I disconnected the power mirror assembly in the course of replacing the glass and fixing the spring). much appreciated!