C-15 check engine light Pete 387 2007

An intermittent CEL but no active fault code is usually(in my experience 3 different times) a bad wiring harness connection under the valve cover. The non-working temp in the mirror might be a bad ground but I doubt it, probably a sensor.

 

You'll need to get it hooked up to a diagnostic computer and read the logged codes.

The mirror temp sensor will not make the check engine light come on. Check the wiring 1st, if you need a sensor, they are about $35.00 and come with the rivets you'll need to pop rivet the mirror back together.

 

Hi there

Need help.

I have a Cat C-15. The check engine light comes on flashes a couple of times and remains on. Some times it will come off and stay off for a while and then come back on. Also ABS light on and same ordeal on/off. Scanned with computer but the codes were off the dash at the time. It read no fault. I also did the check myself with the cruise controls and i got back code 55 !! (Which means no code) What ever that means !!

I recently did an overhead and thats when the check engine light came on and I feel that when the truck is in a pull it has loss of power or hesitation (maybe loss of fuel or pwer, not sure) it just doesnt feel right. It vibrates a bit when it pulls.

Can anyone help with this? Has anyone had this similar problem? Please advise.

Thanks,