What causes check engine light to come on in the cold months mornings

Asked by Gilles Nov 22, 2016 at 09:54 PM about the 1994 Jeep Grand Cherokee SE 4WD

Question type: Maintenance & Repair

My 94 Jeep grand cherokee has a check engine light comes on in the morning when the cars cold. and sometiimes it it cut off like it has vapor lock and take a whiel to start back up. Also the smell of  raw exhaust fumes. the hand scanner says coolant temp sensor. where is that located?

2 Answers
3,885

nicecars12 answered 8 years ago

It has nothing to do with the cold/hot/rain/snow/or/tue.your 02 heater sencers are shot/your computer is on its way out/the car is a 94.say thank you every day you get home.I am not picking on your car

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