Huh! I don’t even *see* that code in my 2011 Helm Manual! Only goes up to P0118. Must’ve been added later on?
All I see is codes P0116-P0118 and they’re all Engine Coolant Temperature Sensor “Performance” or “Circuit Low/High Voltage”. The solution for these codes is either replace the Sensor or replace the ECM (computer).
I’m not sure how a bad ECT could affect the A/C ... unless it’s somehow causing the air blend door to change states ... like maybe it thinks the engine is getting hot and so it turns on the heat to try to bleed some of it off through the heater core[IMG class=inlineimg]https://www.equinoxforum.net/images/smilies/huh.gif[/IMG] Never heard of that, though ...
UPDATE: bigb12359 posted the A/C answer below ... the ECM just shuts it OFF!
2011 Equinox 1LT (new Jan 2011): Summit White / 3.0 L V6 / FWD / Pioneer Stereo / 18" Wheels / 138.2k miles [05-NOV-2019]
2002 Impala 1LT (new Jun 2002): Summit White / 3.4 L V6 / FWD / Cassette-CD Combo /225.5k miles [05-NOV-2019]
Last edited by Colt Hero; 10-22-2019 at 11:59 AM.