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sprinkles08, ASE Certified Technician
Category: Transmissions
Satisfied Customers: 22976
Experience:  Chrysler/Dodge/Jeep master tech ASE Master and Advanced Certified, Chrysler/Dodge/Jeep Master Certified, Trans Specialist
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2003 mini coopers s 6 speed cvt trans EP light on... no

Customer Question

hi 2003 mini coopers s 6 speed cvt trans EP light on... no lights on transmission cover not sure what gear it locks in at 3.000 rpm @80 kmph . no bad noises drives quite well,it will from time to time go back to normal. (LIGHTS BACK ON TRANSMISSION COVER AND INSTRUMENT PANEL) for a very short time . no jerking. quite smooth oil .change and filter 500ks ago.nothing bad there..seems like electrical but where. john thanks
Submitted: 1 year ago.
Category: Transmissions
Expert:  sprinkles08 replied 1 year ago.

Hello and welcome to JustAnswer!

It sounds like the transmission control module is most likely going down. If the TCM isn't operational then the trans won't shift, and since it isn't there to monitor the range sensor you won't have a functional PRNDL display.

If the TCM is going down it could be a loss of power or ground or the module itself.

The first thing that will need to be done is see what fault codes are setting. If the TCM is going down there won't likely be codes in it, but other modules will have codes for lack of communication. If the TCM is actually staying awake through the event and the trans is actually going into limp in then there will be codes in the TCM that will be used as a starting point for testing.