Check Engine light this morning
 

well we have had some weird weather. the temp rose to 60* this morning after my truck sat in the barn and was chilled to the bone from the weekend. well when I started it it set a light in the dash. so at lunch I spun into the dealer and grabbed the Tech II and ran the code. come to find out it had an Evap code cause the weather changed to fast. the same thing happened last year. just cleared the code and it was fine. so if by chance you get a light after a severe weather change in temp or Baro pressure it will most likely be the evap code.

Re: Check Engine light this morning
 

I received the check engine diagnostic 10 days ago on my 2008 as it intermittently came on and off during the recent cold spell here in NJ. Remote start becomes inactive in conjunction with this diagnostic. Resolution was the same as code was reprogrammed at dealer.

Re: Check Engine light this morning
 

My check engine light is on more than it's off these days. It would make sense as Denver has 40 degree temperatire changes every day.

Re: Check Engine light this morning
 

Had the same issue here in the chicagoland area a couple of weeks back that gave me a light...... after about a week it went off. We were at 50 degrees here yesterday and within about 4 hours the temp dropped to 4 degrees. No engine light but we'll see :D

Re: Check Engine light this morning
 

My experience was same as already mentioned in Forum --the beast would like some higher octane fuel like a drink of hi-test. Cure all my check engine light problems, She don't like no jeep gas--cheap.

Re: Check Engine light this morning
 

Cheap.

Funny.

Cheap Wrangler
Cheap Cherokee
Cheap Wagoneer
Cheap Liberty
Cheap Commander

Lots of cheap.

Re: Check Engine light this morning
 

My wife got the check engine light the other day and onstar said check the gas cap. Restarted the engine and no more light. Here in N.C. we have had days in the high 20's and the next day 60. My H2 sits in a heated garage so who knows what the problem was .

Re: Check Engine light this morning
 

One thing to keep in mind...if you don't screw your gas cap on securely it will cause your check engine light to come on as well.

Re: Check Engine light this morning
 

Have you installed a CAI?