Question about 2000 Hyundai Sonata

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2000 Hyundai Sonnata trouble code P0725

The car came into my shop with a no start, the crank sensor was bad. Replaced it with a factory part. Now the customer is experiencing a check engine light, and code P0725. There are no performance problems during test drives. Following Aldata chart, they say the TCM is tied into the system. Could you shed some information on this problem. Thank You Chuck Isaac. Isaac Automotive and Maintence

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Hi Chuck, I'm assuming you changed the crankshaft position sensor that is underneath the timing belt? If so, there is another sensor that is functionally tied to to it. There is a transmission input speed sensor. This sensor is below the bracket holding the shift cable in
place and is much easier to replace. I'm not a Hyundai specific tech so please be aware, I'm guessing :-) I would shotgun the input speed sensor at it if it is not too expensive. I believe that these two sensors work in conjunction to tell the computer if the lock-up is slipping. This may be one of those; "Tag, your it" problems and maybe that ses light was on previously.

Posted on Mar 11, 2009

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