Hello all,
Hoping I could get some help diagnosing AC problems and two check engine light codes.
Took it to three different shops, none have been able to solve the issue, so have been digging info on my own.
Currently, turning on AC does not engage compressor clutch or turn on low speed radiator fan. AC used to work intermittently, cycling on and off, but now it refuses to turn on.
Jumping the AC relay at the underhood fuse box engages the compressor and air blows perfectly cold inside. Jumping the high speed and low speed fan relays also turn on the fan, which leads me to believe this is something electrical and not mechanical.
Shops have done the following:
-Checked and refilled refrigerant levels
-Replaced underhood fuse box
-Replaced high pressure side connector and high pressure switch
-Replaced low pressure switch
-New OEM radiator fan
-Installed external relay kit for radiator fan from wireeverything to avoid the melted pins issue with the fuse box
Have check engine codes P0059 and P0053, which started around same time AC went out.
Replacing bank 2 upstream oxygen sensor did nothing for code P0059.
One shop suggested replacing the AC compressor but don't think that will do anything since it works when jumped. Thinking could be melted wiring somewhere related to the O2 sensors, throwing off the PCM command for the AC. Inspected visually but don't see anything obvious.
Stumped of what to do next. Thanks for any suggestions.