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I did diagnostic engine codes check. on my 1988 Plymouth...

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Question by Roy
Submitted on 7/27/2003
Related FAQ: rec.autos.makers.chrysler FAQ, Part 1/6
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I did diagnostic engine codes check.
on my 1988 Plymouth Sundance.
I got code 21 for oxygen sensor problem.
I also got code 37 die torque converter unlock
solenoid circuit problem.
And I also got code 52 for oxygen sensor signal input indicating a rich/fule ratio during engine operation.
Do I have to replace the sensors, the torque
converter itself or can this be corrected somehow?
Engine and Transmission run very well except on very hot
days when all at once the engine starts to lose power and
the shut down. It starts up right away. I thought it was the map sensor which I have already replaced. I dont'thave any problem on cool days.

Answer by chiefump
Submitted on 10/19/2003
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usually the torque converter is an expensive part but if you are sure it needs replacing go to a junk yard check prices if you can get a gurantee on a used 1 go for it some sensors require you to replace them for the gas mixture to air to be mixed right.The engine loosing power is a concer start with the cheapest part to replace then go from there


Answer by cargirl
Submitted on 7/18/2006
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i relize this is an old post but i have a newr sundance a 94 and the same codes came up did all the work still had the problem.  found out it was the coolant temp. sensor a 15 dollar part so people if you get code 21 with code 37 try this first


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