Hi everyone,

I'm new to this forum and currently trying to catch up on all the great information shared here.

I’ve been reading through the thread: DCT Conversion Die 1/2/3 - CorvetteForum - Chevrolet Corvette Forum Discussion, and I wanted to share my situation and ask for advice.

I own a 2020 Corvette C8, which I only use on weekends. After sitting in the garage for about three weeks, I tried to take it for a drive. When I shifted into Reverse, I could feel the car go into gear, but it wouldn’t move — the same thing happened when I tried Drive.

I connected a diagnostic tool and pulled a DTC from the transmission. The only error code I received was:

P07E6 – Stuck in Park

I suspect it might be the Park sensor. Is there any way to fix this issue without replacing the entire gearbox? That would be a worst-case scenario for me.

Also worth noting — I’m located in Denmark, and unfortunately, there are no official GM dealers here.

 

Other than valve body changes I don't know of anyone being able to fix internal issues without a complete DCT replacement. If I were in this situation I would disconnect the battery for 10+ mins and see if that resets the system on the off-hand chance that it's not a hard failure. In order to move the car you'll need to gain access to the parking release located on the DCT. You'll need to remove the carpet and trunk closeout panel to gain access. You can search the forum or on-line for it's specific location. Perhaps releasing the parking pall manually a few times would have a positive result but I'm doubtful. Hope it works out for you without undue stress and money.

 

Thank you for the quick reply.
I’ve already tried replacing the battery, and I also attempted to manually release the park lock. When I do that, the car can shift into Drive and car can drive, but I’m unable to turn the car off because it won’t go back into Park until I reset the manual park release.

 

Seems to be a bad parking solenoid or sensor. Internal issue sadly.

 

yeah ok :-/ did hope it was possible to vhange it.

Parking hydraulic unit with solenoids TREMEC DCT TR-9080 [Chevrolet Corvette C8 DCT] BOC0361R-01 BOC0361R_01 AVA0106F-01 AVA0106F_01 SOL0075F-02 SOL0075F_02 from TREMEC – Buy Now for $599 USD

 

I've always felt that if someone put it together, someone can take it apart. Perhaps finding a very experienced transmission technician will make it possible to replace the defective part.

 

i agree , hope they comming an aftermarked for those repair things

 

Never saw that part before, and the older version of the Service Manual that I have does not have a replacement procedure for that. It does, however, have some procedures related to the code that you have. And there may be other issues that are easier to fix. If you do not have a Service Manual I recommend you get access to the latest version. That will be your best bet for diagnostic procedures.

But here is what I found:
The code P07E6 does indicate stuck in park. The procedure for diagnosing it is bundled with several other codes. One of the first steps, if you have that code and only that code, is to check the transmission fluid level "Transmission Fluid Condition and Level Check" procedure. The next important step (again if you have only that code set and no others) is If "DTC P07E6 set
Refer to: Transmission Does Not Shift Out of Park, Brake Applied". So that goes to another different procedure. And that procedure includes checking for certain other issues - with possible remedies including repair of a harness, replacement of the TCM, and finally replacement of the transmission. It does not include a step to replace the park lock mechanism - but later manuals have added more procedures for repair of some of the internal transmission components. I'll attach that procedure I found - but recommend you get a later version.

 

Thanks a lot for all those info, i gonna check it when i get home.
on the Engine module i get a P0700 but i think that is a common error for the hearbox module request MIL
on gearbox module i only get P07E6 and once i also saw P187E, but not after clear dtc

 

That other code is Transmission Park Valve Stuck Off. And yes P0700 is just a request to illuminate the MIL. And there is a different procedure for that. The procedures take you down different paths depending on which codes or combinations of codes are set. But there are lots of things to check before replacing the transmission or the park lock unit.

I'm really surprised to see that part available. Looks like it comes from a salvaged transmission (says removed from a new transmission). Amazing!

 

yeah , and i am the old type so if i cant find the error i could get temp to buy the part and try.

 

Wasn't there another post relatively recently about the park pawl? I think the conclusion was the surrounding casing wears off and the sensor gets confused. The fix seemed expen$$$$$$ive. But, it seems like a rare incident still.

 

tell if you find the post i have been looking to find it

 

I have been looking little more into it, and i see this (sorry for the quality)
the first show 5.1 mm in tolerance anyone know if it is to much
second thing i found (dont see any dtc for it), say malfunction in park stepper motor

 

There is a documented condition called park lock sensor drift.
https://static.nhtsa.gov/odi/tsbs/20...49947-0001.pdf
Based on the bulletin, it appears that the maybe the sensor "shifts" - the bulletin instructs the tech to start a TAC case immediately and forward the park sensor measurement found in GDS transmission data. I assume that this is data that can be captured with a scan tool. The data are provided to the TAC agent. The agent will request engineering to verify the park position at birth. Apparently certain data from the transmission are captured during manufacture and stored (the Service Manual also alludes to this). Comparison of this data will confirm whether the transmission has park sensor drift that will require transmission replacement, or the correct direction of vehicle repair.

So simply stated, if it park lock sensor drift, it requires transmission replacement according to the bulletin. But it could be something else.

The OPs case does not appear to have the symptoms described in the bulletin though.

There was also another thread where it was asserted, based on "inside information", that ferrous particles (iron) can accumulate on the park lock sensor causing it to fail - the sensor is a "hall effect" sensor and contains a permanent magnet that can attract and hold ferrous metal. I have never seen any official statement regarding this - and I do not know if it is, or could be the cause of the apparent drift in the park lock position.

 

Maybe your talking about this thread.

https://www.corvetteforum.com/forums...rchid=97188808

 

while i am looking at the wiring, does any have wiring diagram or know if they is a speciel wiring for Park or is it just over canbus

 

i cant get that link to work

 

My bad, this is the link.

https://www.corvetteforum.com/forums...31k-miles.html