- Buick Ownership
- 1995 Buick Riviera
This may have been answered here already. However I have a 1995 Riviera S/C I bought this car in 2014. The temperature gauge has not worked since I purchased the car. Now what I have done is replace the temp sensor. I was told that this car has two, but I have found this to be false. This car has only one. Now I pulled the cluster and tested the gauge head. I works correctly. When you start the car it rises from its resting position to the first line. Does not move after that. I had several codes and traced them back to the pcm. That has been changed and the codes are gone and have been for six years now. The A/C work correctly so that tells me the pcm sees the correct temperature and when I have it connected to the obd scan tool it registers the engine temp between 180 and 210 depending on the cycle of the thermostat. Kinda stumped here. The only other symptom is the idle is low during cold start but runs perfect after that. Fuel pressure is good, I did replace the fuel pump do to the fuel gauge not registering correctly. I am not sure what else to check. I can add an aftermarket temp gauge but I rather enjoy the look of the factory cluster. Thanks for any help but I understand if I am at a dead end.