my speedometer doesn’t work but every other gauge does on my 99gt cluster my car was a 2004 v6 swapped with a 99gt everything I don’t know how to fix this speedometer problem my obd2 read the car is going 17 kph max even when we are on the highway
It’s a 1999 engine v8 in a 2004 body the obd was reading speed but the actually speedometer was not movingIs it an automatic trans? If so 99-03 read vehicle speed differently than 04 did due to a change in the transmission.
The obd does have speed actually but the speedometer was not moving at allHave you checked the speed sensor as 08GT500 suggested? The fact that OBD doesn't have the speed means the ECU doesn't either.
right I will check that is that is there any reals ya to tell if it’s the sensor or a wiring issue or do I just replace itIt may be that the speedo should move, but that is also right at the bottom of the speedo (mine starts at 10mph), and they aren't 100% accurate. Could be that it's just low enough not to actually show on the speedo.
In any event, the PCM controls the speedo; if it thinks you're only doing 17 kph at highway speeds, something between it and the speed sensor is off.
I do believe the speed sensor is on the driver's side, but it should be the only electrical connection on the tail of the trans; on my T45. You might confirm it's even the right type (if the trans is 98 or older it wouldn't be for instance).
If I have a 96-98 transmission would I have to get a 96-98 gauge cluster and have it reflashed ? Or...The 96-98s still have an electronic sending unit, the difference is it's driven by a gear in the transmission, where the newer ones uses hall effect sensor/toothed wheel.
I'd probably ID The trans first; there should be a metal tag on the transmission with the model and part numbers. Check this for more: Identify Transmission Code