What does code P1532 mean?

Q: What does code P1532 mean?

A/C Evaporator Temperature Sensor Circuit Low Voltage. P1532 on a GM vehicle means the powertrain control module (PCM) has detected a low-voltage signal on the air conditioning (A/C) evaporator temperature sensor circuit, indicating the sensor is reading colder than physically possible or the circuit is shorted to ground. The PCM uses this sensor to prevent evaporator freeze-up by cycling the A/C compressor clutch, so a low signal can disable compressor operation or cause erratic cooling.

DTC codes / GM codes / P1532

P1532 · GMA/C Evaporator Temperature Sensor Circuit Low Voltage

P1532 on a GM vehicle means the powertrain control module (PCM) has detected a low-voltage signal on the air conditioning (A/C) evaporator temperature sensor circuit, indicating the sensor is reading colder than physically possible or the circuit is shorted to ground. The PCM uses this sensor to prevent evaporator freeze-up by cycling the A/C compressor clutch, so a low signal can disable compressor operation or cause erratic cooling.

SystemPowertrain

Code typeGM specific

SeverityMedium

Fix difficultyIntermediate

AreaVehicle speed, idle control and auxiliary inputs

Guidance is general and written for GM vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.