Where is this puppy at? From what I hear, a faulty coolant temperature sensor in C-68 GM AC system will stop the compressor from working. Does the 95 have a C-68? I mean all other things on this car are electronically controlled. Someone help please,

Thanks
TRU

If you're referring to the Engine Coolant Temperature (ECT) sensor it is located on the driver's side of the engine between EGR and the rear valve cover (nearest the firewall). It has a two-lead connector one yellow and one black. My engine is still hot from the commute home and it's getting dark so I couldn't "climb in" or see to validate it's location for you.

I'm confused, you also mention the A/C and C-68. There is a Diagnostic Trouble Code DTC-68 but this pertains to the Cruise Control. So, I'm confused. Can you elaborate???

GM has several types of Air Conditioning Systems. I wanted to know if the Aurora had an electronically controlled system in which the ECT plays a role in kicking the compressor on and off. C-68 is simply a GM Air conditioning type that I thought the Aurora may be part of.

My SES shows a code P0117 and from this code my ECT may be faulty. If so, my Air Conditioning compressor may not be working if its electronically controlled such the C-68.

Sorry for the confusion.
TRU

Aurora does have the sophisticated A/C system. PCM will engage the A/C clutch anytime the A/C is requested unless any of the following conditions are met:

High Coolant Temp
Low Battery Voltage
Low Evaporator Pressure
High Engine RPM
High A/C System Pressure
Low A/C System Pressure

FSM also says PCM will not activate the A/C clutch with a stored DTC. Just curious, anybody out there have cold air with a lighted SES??

I used to have it running all the time when I had my input speed sensor trouble with my tranny. As a matter of fact when they fixed it they also told me a code in the computer, but not making the SES light come on, was that I had low refrigerant levels (maybe pressure, I honestly don't know). I can't tell you which code that was, but to sum it all up, my a/c worked fine through it all. I just had the system recharged after dropping my other 2 weeks o' paycheck on the tranny and went on my merry way.