Nissan Repair Questions? Ask a Mechanic for Answers ASAP
Hi there, thanks for the question.
I have seen this a bunch, I was actually going to say to check for cross contamination before I read down further and seen you already confirmed it.
This is going to be a faulty TCM, you replace the control valve (valve body with TCM) to correct the issue. Unfortunately when you have the cross contamination issues, even if you catch it early the water in the coolant can cause issues like this when it has came in contact.
It's not entirely too difficult. Just mark the bolts as they aren't all the same lengths.
main thing is you need to initialize the trans after installing it. This clears the EEPROM.
If you buy the part form the dealer, make sure the TCM is not completely blank. That should only apply to 2013+ year models, but I always tell people to make sure before purchasing a TCM.
Assist gives us different recommendations for CVT, 5 speed a/t, and 4 speed a/t.
For instance is you replace the transmission but not the TCM then you initialize, or vice versa. Anything that incorporates a previously used component on a new TCM needs the EEPROM replaced.
Since your replacing the control valve (valve body and NEW TCM) you shouldn't have to initialize.
if its not a brand new one you MUST initialize. no choice or you will cause premature failure to the trans
where are you purchasing it from? and does it come with the TCM?
it means it's a blank TCM and they will have to program it once installed.
you need to make sure the dealer your purchasing it from, will perform the service after you install the part.
It would have to be towed in this situation.
Let me know if you have more questions.