2002 Cadillac El Dorado How to clear or fix code 1312

2002 CADILLAC ELDORADO
65,000 MILES • V8 • FWD • AUTOMATIC
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JOINTDOC
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A/C not working on 2002 Eldo. A retired mechanic played with the buttons and got an error code 1312 which appears to mean High Side Temp Sensor Open Circuit.

How do I find this sensor, can I replace or fix it myself?

How do I use the AC controls to find codes and clear them?

If I clear the code, how do I add Freon myself?

Bob G
Jul 16, 2009 at 8:08 PM
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FACTORYJACK
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The temp sensor is in the high side line, by the plastic clip that holds the line down near the center firewall. It may or may not be a sensor, it could be wiring. you should have 5 volts on one wire, and the programmer grounds the other. both the low temp, and high temp are the same and can be switched to see if fault follows sensor. I don't recommend or endorse adding freon yourself, if you have to ask how. It is dangerous, and can cause more problems with the system if done improperly. A parts store might sell you the do-it-yourself kit, though. Clearing/reading codes-push off and passenger warmer until a segment check displays, and codes follow. Fan down will scroll modules and options, fan up will select. Go to ACM, or ACP clear codes.
Jul 16, 2009 at 11:52 PM