I changed the transmission in it and now it want start


I changed the transmission in it and now it want start Mechanic's Assistant: Will the headlights turn on? Is the battery fully charged? Yes but I did disconnect the computer when changing the transmission Mechanic's A...

I changed the transmission in it and now it want start Mechanic's Assistant: Will the headlights turn on? Is the battery fully charged? Yes but I did disconnect the computer when changing the transmission Mechanic's Assistant: What is the make/model/year of your transmissions? 2012 Mechanic's Assistant: Are you fixing your vehicle yourself? What have you tried so far? I have went back and made sure all the wiring was connected back

Automotive Expert
Hello and welcome to Just Answer! My name is \*\*\*\*\* \*\*\*\*\* I am here to help answer your questions. I am sorry to hear you are having issues with your vehicle. I will do my best to give you the answer you are looking for. Please allow me a few minutes in between our responses to review your information. I may ask several questions to get more [details](/topics-detail/) about your problem. While you are waiting for me to respond I am looking up the workshop manuals and wiring diagrams needed to answer your concerns. **The website will prompt a phone call automatically, not me. So please don't let this automatic service prompt annoy you. If you prefer to talk verses type then please use the phone call option.** Hello, what kind of 201 car/truck is this? Why did you replace the transmission? Is it a used unit?

It's a 2012 nissian Altima and I got a used transmission but same model
Automotive Expert
Ok, why did you replace the transmission, it had no issues starting before the repair?

The transmission went out and no issues before the repair
Automotive Expert
Ok and all wiring connections were checked, grounds, starter motor, transmission wiring? Do you have access to a scan tool to check the transmission for fault codes?

but the transmission did not have any codes the scan said intake valve control solenoid circuit bank1 throttle peddal sensor was high A and b curit was high and intake air temperature sensor 1 was high and the pressure control solenoid A and B pressure
Automotive Expert
If they are high, that means there is something not connected properly. Being a used transmission the issue can be in the trans, is it a 4 or 6 cylinder engine?

4 cylinder 2.5
Automotive Expert
Make sure the transmission is reading park or neutral with a scan tool, find out what is not connected in regards \*\*\*\*\* \*\*\*\*\* those fault codes. if they were not there before the repair, then it has to do with what you touched. Try putting the transmission in neutral and see if it will start or jump the starter motor and see if it will crank over or run.

It will crank over now but want start up and run
Automotive Expert
Well you went from one problem to the next. You have something disconnected or not right with the work if it ran before the repair. Check all your work.
Automotive Expert
I hope you find this information helpful. If any part of my response is unclear, please let me know. It’s my goal to deliver excellent service, so please let me know if there is anything more I can do. Thank you for using our site.

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