P0535 Code: Meaning, Causes, and Symptoms | OBD2 Codes

P0535 – A/C Evaporator Temperature Sensor Circuit

 

P0535 Possible Symptoms

 

Engine Light ON (or Service Engine Soon Warning Light),A/C Inoperative,A/C Blows Warm

 

P0535 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

 

P0535 Description

 

The refrigerant system incorporates an A/C compressor controlled by the Powertrain Control Module (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).