P0535 Buick A/C Evaporator Temperature Sensor Circuit
Possible causes
– Faulty Evaporator Temperature sensor
– A/C evaporator temperature sensor harness is open or short
– A/C evaporator temperature sensor circuit poor electrical connection
– A/C evaporator temperature sensor harness is open or short
– A/C evaporator temperature sensor circuit poor electrical connection
What about the obd code?
The Powertrain Control Moduel (PCM) has detected a fault in the temperature sensor circuit
Symptoms
– Engine Light ON (or Service Engine Soon Warning Light)
– A/C Inoperative
– A/C Blows Warm
– A/C Inoperative
– A/C Blows Warm
P0535 Buick Description
The refrigerant system incorporates an A/C compressor controlled by the Powertrain Control Moduel (PCM) through an A/C clutch relay. The climate control assembly sends an A/C request signal to the instrument cluster module, which relays the request to the PCM. An evaporator discharge air temperature sensor is used to disengage the A/C compressor clutch when the evaporator core temperature falls below an acceptable temperature.
The 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).
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