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Q: check engine light on--- on 2000 Mercury Sable

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
car idles rough when sitting at traffic light
No car image 94a1663db56199c5353592009e34aaa51078a2469bed068bb8d6f0ba43accf97
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Check out the RepairPal article on the Check Engine Light: http://repairpal.com/check-engine-light

That'll get you started. It could be a number of things causing the problem, so you'll need to seek out a good diagnostic technician.
I had a tranny put in my 2000 sable and afterwards the check engine light was on and the sable would not idle, warm or cold. A mechanic friend of mine checked the vaccuum hoses and both of theL shaped hoses had huge holes in them. He fabricated some for me and put them in in under 20 min. the next day. The check engine light went off and she idles great now! wonderful mechanic but i'm in a different town now.
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