What's Up Fellas,

I recently received a U1000, P0705 and P0615 DTC codes I have done a little research prior to landing here in this forum. It seems to me that i need to buy a new transmission but I am not so sure that will fix all the existing problems aside from the U1000 and P0705 I assume being that thats the communication error (?). when i put the car in reverse the reverse lights flicker on and off really fast along with this ticking behind the infotainment system. There are two relays behind there, i tried to replace both but to no avail. Im hoping replacing the trans will fix the issue but as i said im not so sure. Could someone give me insight on these DTC's and what i should do. Also! If i wanted to swap for a 7AT how would i go about that? i would 6MT but i'd rather do it to my actual project car not my daily. i took the valve body out to inspect the wiring around the upper half of the VB that connects to the TCM directly i made sure eveything went back in the same way it came out and now she doesn't move , takes about 5K RPMs just to get her to creep a bit so she's still parked for now. If anyone knows anything i would greatly appreciate your input.

P0705 code stands for “Transmission Range Sensor Circuit Malfunction (PRNDL Input).
P0615 code stands for "starter relay (also called the PNP relay or park/neutral relay) is in the “On” position when the vehicle is not in park or neutral.

Warmest Regards

 

No you cannot swap in the RE7 transmission.

What you're describing about having to rev the engine just to get it to creep is typically just low fluid.

P0705 is the park/neutral switch. Here's where it's located on the TCM. Basically you would just check continuity on the harness that plugs into it to make sure there's no broken wires.



P0615 is the starter relay circuit, basically the TCM detected the car is starting in a gear other than park or neutral.

 

Sounds to me like you probably have a valve body issue.

 

So would getting a new valve body and having it flashed possibly fix the issue or would I need a whole new transmission?

 

Asking because I already took the valve body out and checked the harness and plug ins no damage there , maybe a fuse ?

 

Having the TCM flashed probably wouldn't do anything. I doubt this is a software issue.

Putting in a donor valve body might fix the issue, if you could pull a valve body and TCM as a pair from a suitable donor that would be more likely to fix it just in case the issue is the TCM.

 

Last thing my friend I will be out of your hair, RE5R05A has 2 separate parts that bolt together? Like Top Half and Bottom Half or is the valve body just one whole device with only the solenoids being detachable. I see you need allen keys to remove the solenoids and a 10mm for the other 2 miscellaneous bolts.

 

Also! the shift lock solenoid attached to the actual shifter wont have anything to do with either of these codes? it gets a little hard to shift out of park and back into park there a certain "sweet spot" i have to push on the lever to get it "unstuck"

 

The 2004.5+ cars the valve body and TCM are bolted together, it's on the same side as the solenoids. It's not really an upper/lower half it's mostly just "top or bottom". That PNP switch is replaceable on it's own, there's a plunger that goes through the shaft next to it to actuate the PNP switch.

Sometimes it's the PNP switch that fails, sometimes that plunger fails.

The shift lock solenoid is probably not causing those codes though, but if you're struggling to physically move the shifter, and your brake lights are on when you press the pedal, then you might also have a failing shift lock RELAY which is a lot more common than the solenoid. Try using the override button on the shifter housing to see if the problem goes away. If it does NOT then you might have something physically bound up inside the shifter itself.

The shift lock relay is mounted on the left side of the shifter, it has some black mastic and foil over the top of it.

 

thanks a lot brother will look into it and report back, do you happen to know of a website where I can purchase another switch for the 5AT? ? Dealership says they dont have any, that i would just need to replace the transmission but I'm sure there has to be somewhere I can purchase just the switch and/or plunger. I'm sure I have enough mechanical prowess to get it changed out should I find a suitable placement. New tranny is definitely a last resort.

 

I would just source a used or rebuilt valve body, it comes with a new PNP.

Sonnax is my go-to for that kind of stuff, just need to figure out which one you have, once you have the Sonnax part number for the valve body you can put the part number into Rockauto and order it through them or whoever has them in stock.

https://www.sonnax.com/tech_resource...identification

Alternately you can source a used one from a donor vehicle or ebay. Just be sure it's the right one, usually you can get them with the TCM attached for around $300 or so. If it's a used TCM it won't require any programming.

I've heard a lot of hit/miss about the "rebuilt" ones on eBay though, I'd go with a used OEM unit.

 

I ended up finding a pnp switch im going have it installed soon in hopes that it fixes the issue if not i have a friend offering me a valve body from his 2010 g37 i dont think it'll be compatible but i thought i may come here to ask first before i just completely turn him down and confirm my suspicions. If the switch fails and i cant use the VB from the g37 then i will go ahead and search for one through JATCO.

Sidenote the g37 2008 came with 5sp tranny if i can get lucky enough to find one and get the VB that WOULD be a suitable donor correct ?

 

The G37 doesn't use the RE5 transmission, it uses an RE7. So the valve body as a whole wouldn't work, but knowing Nissan they typically like to reuse components so it wouldn't surprise me if the PNP switch was the same.