I have a 98 buick park avenue, the a/c compressor is not working,but if I jump the compressor clutch relay wire at the computer the compressor kicks in and it blows cold air.
I'm getting no voltage at the a/c pressure sensor signal wire(red} I repaced the a/c pressure sensor,still no signal,what could be the problem. I have some history codes P0113, P1111, P1604, P1639 and P1641.
If you buy a shop manual at the local parts house they have all the codes and what they mean. The book is cheap.
just chagre the system would be better if you had it checked for leaks after repair or no repair needed then have an a/c service
if the system doesn't have enough pressure in it, the sensor won't let the AC run.