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My car was doing one today and all of the sudden when I left work, it shifted really hard into first and second and then when it shifts into 3rd gear my traction control shut off and my service engine soon light turned on. Please help!!!!!!


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Check TCM fuse first.
 

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Because MAF is not working when there is a large leak, at this point ECM sends an error code to the TCM which in turn set transmission fluid pressure to maximum. Hence the hard shift.
 
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