P0539 Buick A/C Evaporator Temperature Circuit Intermittent
Possible causes
– Faulty A/C Evaporator Temperature Sensor
– A/C Evaporator Temperature Sensor harness is open or shorted
– A/C Evaporator Temperature Sensor circuit poor electrical connection
– A/C Evaporator Temperature Sensor harness is open or shorted
– A/C Evaporator Temperature Sensor circuit poor electrical connection
What about the obd code?
When the A/C Evaporator Temperature (ACET) sensor signal is intermittent the Powertrain Control Module (PCM) will triggered the P0539 Buick code.
Symptoms
– Engine Light ON (or Service Engine Soon Warning Light)
– A/C Inoperative
– A/C Blows Warm
– A/C Inoperative
– A/C Blows Warm
P0539 Buick Description
The Powertrain Control Module (PCM) sources a low current 5 volts on the A/C Evaporator Temperature (ACET) sensor circuit. As the A/C evaporator air temperature changes, the ACET circuit resistance changes (which changes the voltage the PCM detects).
P0539 Buick Information for specific makes
P0539 Buick FORD
Buick Vehicle:Buick Regal – ?Buick Riviera – ?Buick LaCrosse – ?David Dunbar Buick – Buick Century – Buick LaCrosse – Buick LeSabre – Buick Lucerne – Buick Park Avenue – Buick Regal – Buick Verano – Buick Enclave – Buick Encore – Buick Rainier – Buick Rendezvous – Buick Terraza – Buick Riviera