c6targa

Hi guys!
1month ago I bought a 4speed automatic corvette c6 with only 35000km on gauge.

The speedometer, an the HUD speed isnt workning.
I think the car start in 2, or 3rd gear and when the rpm is above 2k it feels like it shift down and first at around 5k rpm the car will accelerate.
I got foultcodes p0717 and p1810.

So I have changed the speedsensor att the rearend and today I changed the oil pressure switch. No difference. the problem is still there.

drove the car about 2km and i got no foults to my elm327 obd tester.. Mabye i have to drive it more before the codes shows up?

I also got missfireing if i rev it "to fast".. but no foults on that..

I live in Sweden and around here dont have any mechanic that works with corvettes..

Someone got ideas?

c6targa

Took it for a ride today and find out that if i set the gear in 3 i go around the problem like it start to slipper after 2k rpm.. start in 2nd or 3rd gear even if i put it in 1.
Drive it about 30minutes around town and then check foults. only p0717 that means speedsensor.
So can it be that easy that its just a cable thats broken or something like that?

Have to check if I get any volts back to the sensor on rear end.

Jose2SS

There is a module of the transmission, costs around $95.00 dollars. ACDelco 24226863 GM Original Equipment Transmission Control Module. I had the exact problem, this module was replaced, problem solved.

c6targa

Was it just the gears that didnt work, or does the speedometer shutdown also?

Because I have p0717 fault code that means no signal from the sensor.

Jose2SS

In my case, it was taking off on 3rd and not shifting properly, module replaced, 100% perfect.

89Roadster

A blown TCM fuse will cause the car to go into limp mode. Check the fuse under the hood before you try anything else.