Hi, newbie here. I just had the driver-side CV axle replaced on my 1996 Honda Accord LX Station Wagon (147,000 miles). Immediately after that the transmission starting not wanting to shift, even though prior to that it was working perfectly. By the next day, the transmission would barely shift and the CEL came on and threw a P0715 (NOT P0175) code. I checked the tranny fluid and it looked fine. Jacked the front end up and the replaced axle turned just fine, with no play at all, unlike the old one of the other side that had a bit of play in it. Took the car back and the guys claimed they checked the shaft sensor wires and said they were fine and shrugged their shoulders. They also swore they didn't add any fluid to the transmission.

Is there anything these yahoos could have done to cause this? Seems awful strange to be such a horrible coincidence.

thanks to anyone who might have any ideas.

 

Are you sure thats the correct code youre getting ?

 

I didn't pull the code myself; it was pulled by another shop, a quite reputable one. I've left the car at their shop over the weekend and they'll do a more thorough diagnosis sometime during the middle of next week. They're aware that the problem started immediately after the CV axle replacement.

 

That code is not transmission related. You need a second shop to pull the code to confirm. PepBoys and aamco will pull it for you, just to name two.

 

The trouble code is probably P0715 instead of P0175 (numbers transposed).

A/T DTC P0715 is problem in the mainshaft speed sensor circuit. P0715 is set when the Powertrain Control Module (PCM) is not seeing a speed signal from the mainshaft speed sensor or there is a greater than a specified value difference between the VSS and countershaft speed sensor.

There is a Honda service bulletin (TSB 01-012):

Honda TSB 01-012

If someone has a scan tool, they can compare the speed values of the mainshaft speed sensor to the countershaft speed sensor and VSS (vehicle speed sensor).

 

Arrrg! I must be going dyslexic or something, you're right, and the code is actually P0715, I just typed it in wrong here

I'm going to edit my original post to change P0175 to P0715 if I can.

 

Arrrg! I must be going dyslexic or something, you're right, the code is actually P0715, I just typed it in wrong here

I'm going to edit my original post to change P0175 to P0715 if I can.

and that thanks for the service bulletin too!

 

I posted the same reply on the other forum where you originally posted.

 

BTW, as on the other forum, I'm posting the resolution as follows:

Here's the upshot: the shop I brought this to said they ran enough of the diagnosis in the service bulletin that it showed I needed a new transmission; I think they also said it wouldn't shift from 2nd to 3rd gear. Interestingly enough, while driving it home, I discovered shifting manually works pretty well.

At any rate, it's a nearly 20 year old car with 170,000 miles, worth maybe $1,000.00 KBB if it had a working transmission, so not worth fixing, particularly if you add another 3-4 hundred to replace the captive front brake rotors and pads.

So, I'm probably gonna buy a late model, super low mileage, end-of-lease Accord sedan EX/SE with builtin Honda Certified Pre-Owned warranty for 15k or so.

thanks for the help, everyone!

 

For S&G you could test the MN sensor yourself, or at least pull it out and make sure it is free of ferrous material, same with the NC sensor. These two sensors watch the Main and Counter shaft speeds then the PCM determines when to shift.

If the sensors are not giving good output readings the PCM will not shift or properly shift the trans.

Honda Electronic Transmission Problem- Troubleshoot, Inspection, Repair, Replace.

Scroll down to 'NC/NM speed sensor, code 9/15'.

Did they pull either sensor and check that the magnetic pickup was not covered in material?

 

Don't know. I should call and ask them.

 

If you had no issues before the axle was replaced then the first shop is liable. You need to go back and raise hell. They are clearly trying to do you one over. Sounds like they just trying to get you to pay for a new tranny.

Threaten to complain with your state bureau of automotive repair.