Nissan Rogue 2010 no reverse after replacing valve body

[NumeroSupremo]

Vehicle moves forward

Vehicle does not go backwards.

Vehicle throws codes related to accelerator pedal position sensor.

I didn't work on that so I am stupefied.

I have checked the service manual and it seems to me that two things could be responsible for this state of affairs.

Failure to replace transmission lip seal ( A MUST)

Failure to reprogram the TCM

Are these ideas on the mark?

Any and all advice would be appreciated.

[NumeroSupremo]

Here is the factory repair process in pictures

https://cdn1.imggmi.com/uploads/2018...5b96f-full.png

https://cdn1.imggmi.com/uploads/2018...10e87-full.png

https://cdn1.imggmi.com/uploads/2018...70bbd-full.png

https://cdn1.imggmi.com/uploads/2018...3d45f-full.png

https://cdn1.imggmi.com/uploads/2018...dbf78-full.png

https://cdn1.imggmi.com/uploads/2018...c10ea-full.png

https://cdn1.imggmi.com/uploads/2018...46222-full.png

https://cdn1.imggmi.com/uploads/2018...c842f-full.png

https://cdn1.imggmi.com/uploads/2018...2adee-full.png

https://cdn1.imggmi.com/uploads/2018...7732f-full.png

https://imggmi.com/uploaded/2018/9/6...-full.png.html

https://cdn1.imggmi.com/uploads/2018...182a7-full.png

https://cdn1.imggmi.com/uploads/2018...352ed-full.png

https://cdn1.imggmi.com/uploads/2018...31065-full.png

If you go through these pictures it mentions, removing the lip seal as the process of disassembly, and installing it as the first process of reinstallation.

I studied the factory manual for a similar vehicle from Nissan with essentially the same transmission, it said not to reuse the lip seal, could this be in factor in the loss of reverse?

[darylzero]

None of those pictures work.

Why did you replace the transmission valve body?

Nissan doesn't even replace those, they just give you a whole new transmission.

[amc49]

Depends on what the lip seal seals. Most destroy removing them so there.

'Vehicle throws codes related to accelerator pedal position sensor. I didn't work on that so I am stupefied.'

If the ECM expects the car to move in reverse and it doesn't it may easily assume the accelerator pedal is not working.

Beyond that the complete lack of post clarity explains much there, if the work got approached in the same haphazard way.

[NumeroSupremo]

So sorry about the dead links

pictures in this shared folder

https://www.dropbox.com/sh/e00buis23mu1 ... wEf-a?dl=0

P1777 caused me to replace the stepper motor when that didn't clear the code, I replaced the entire valve body

[NumeroSupremo]

Depends on what the lip seal seals. Most destroy removing them so there.

'Vehicle throws codes related to accelerator pedal position sensor. I didn't work on that so I am stupefied.'

If the ECM expects the car to move in reverse and it doesn't it may easily assume the accelerator pedal is not working.

Beyond that the complete lack of post clarity explains much there, if the work got approached in the same haphazard way.

Initial code was P1777.

I ran the full gamut of checks from the service manual and it was very clear we had a bad stepper motor

So I purchased and installed just the stepper motor into the initial/original control valve

The initial code P1777 did not go away, instead it stayed back and it brought along with it a bunch of additional codes related to the accelerator pedal position sensor - to be particular, these codes:
P2122
P2127
p2138

There are only two procedures in the service manual that I have not so far followed...removing and reinstalling the lip seal, see pictures

https://www.dropbox.com/sh/e00buis23mu1 ... -26-30.png

and

https://www.dropbox.com/sh/e00buis23mu1 ... -27-20.png

and

https://www.dropbox.com/sh/e00buis23mu1 ... -27-47.png

the second procedure that I haven't followed is...inspection after installation

https://www.dropbox.com/sh/e00buis23mu1 ... -31-17.png

this is all the relevant information I could find on the open internet on lip seals and transmissions: https://www.freeasestudyguides.com/auto ... seals.html

I am available to provide any further clarification..sorry for the brevity of the initial post

[NumeroSupremo]

None of those pictures work.

Why did you replace the transmission valve body?

Nissan doesn't even replace those, they just give you a whole new transmission.

Thanks for the observation..fixed, see dropbox link https://www.dropbox.com/sh/e00buis23mu1 ... wEf-a?dl=0

[Rogue Jarhead]

If you have less than 120k miles on your vehicle Nissan has an extended warranty that covers replacement of the transmission. You may want to at least check it out.

Of course now that you’ve attempted repair yourself Nissan may use that as an excuse not to cover any repairs. I think there is also a time limit on the warranty but I’m not sure how long.