po743
01-29-2012, 12:18 PM
#1
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Year: 1997
Model: Cherokee
Engine: 4.0
po743
Help? This is crazy the ck engine light came on and I got the code po743. I put some Lucas in and my tranny started to shift into od but not all the time just wondering if I should try changing the tranny fluid and filter hoping it will free something up
01-29-2012, 03:57 PM
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Unplug and test is a great way to start. Search for some threads on tranny solenoid testing. I think a couple I looked at from Google suggested 13 ohms being average for a properly operating solenoid. Pressure switches are usually open or closed.
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01-29-2012, 06:00 PM
#8
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Year: 1999
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Engine: 4.0
Although rare, I have seen a P0743 be caused by very dirty transmission fluid.
http://engine-codes.com/P0743.html
But most often, it is solenoid related as already mentioned.
Here is a thread you should read.
http://www.jeepsunlimited.com/forums...d.php?t=504213
http://engine-codes.com/P0743.html
But most often, it is solenoid related as already mentioned.
Here is a thread you should read.
http://www.jeepsunlimited.com/forums...d.php?t=504213
Last edited by tjwalker; 01-29-2012 at 06:02 PM.
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