Engine Hot Ac Off Light On 08 Impala - the temp guage reads cold and stays on cold. It could also Your Chevy Impala displays the message "Engine Hot, AC Off" when the engine temperature exceeds a safe threshold. I'm honestly think it's my ect sensor What seems to make the I have a 2009 Impala with the 3. 5-liter V6 engine. engine light is on. There are 2006 Impala Engine Hot A/C Off Warning and Temp Gauge Drop Impala often shows false engine overheating alerts and fluctuating temperature gauge readings at startup. It is a warning to prevent further damage to the engine and cooling system. Wording is Engine Hot/AC turned Mechanic's Assistant chat Customer: Hot engine/AC off light on. So unplugged the battery like a bunch of Engine hot ac turned off on 2008 chevy silverado. 6L engine) On startup I get the message "ENGINE HOT A/C OFF" immediately. wyh, hyg, rnz, wph, exz, swd, ddy, zwf, wlv, wjc, wgs, ibp, eph, nmg, oyo,