So, since we have gotten the G8 it has been driven mostly highway miles, never sat in traffic as it is not a daily. Well, broken cars forced it out of the garage to be a daily and now I am seeing some issues. At idle, with my foot on the brake, it keeps tossing codes for the transmission speed sensor. P0716, P0717. It puts it into limp mode = max speed 25mph. When it does this, you have to be sitting for a little while, like stuck in traffic. Takes about 5-10 minutes.
The car has a pretty decent size cam in it. The camaro pan mod has been done recently, so fluid was changed.
We went into the service menu when the code came on this last time and the trans temp was around 223f. This seems kind of high to me, but I don't know much about these cars and what its supposed to be.
So questions are....
1 - Should I install a transmission cooler before taking apart the transmission to do this speed sensor. Could my issue be heat related?
2 - Could the cam being on the larger side for a stock converter be triggering something in the speed sensor? I find it weird it only does it at idle with my foot on the brake. You would think a speed sensor issue would be triggered while the car is moving.