Hello:
My 1991 LeBaron is having an issue where the Check Engine Light will
come on evrey 5th, or 6th HOT start. It never comes on on a cold
start, and only ever so often will it come on after a HOT start.
Codes are 12, 22, 55.
The car has 97K miles, and all sensors are orignal (except 02 sensor).
I have noticed also that WARM idle seems rough on occasion. This car
has spoiled me as silky smooth at idle since new, so I have noticed
the rough idle immediately.
No other issues; thermostat is working well (and is less than 2 years
old), no over heating, great MPG (23 in the city).
So, should I just change out the coolant temp sensor? I assume it is a
cheap enough part to try as a first step.
Thanks for any advice!
Bill
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