What does code P1533 mean?

Q: What does code P1533 mean?

A/C Evaporator Temperature Sensor Circuit High Voltage. P1533 on a Chrysler vehicle means the powertrain control module (PCM) has detected an abnormally high voltage on the signal circuit from the air conditioning (A/C) evaporator temperature sensor. The PCM expects the sensor to pull the reference voltage down to a normal range as the evaporator temperature changes, and a high voltage reading tells the PCM the circuit is open or the sensor is not responding.

DTC codes / Chrysler codes / P1533

P1533 · ChryslerA/C Evaporator Temperature Sensor Circuit High Voltage

P1533 on a Chrysler vehicle means the powertrain control module (PCM) has detected an abnormally high voltage on the signal circuit from the air conditioning (A/C) evaporator temperature sensor. The PCM expects the sensor to pull the reference voltage down to a normal range as the evaporator temperature changes, and a high voltage reading tells the PCM the circuit is open or the sensor is not responding.

SystemPowertrain

Code typeChrysler specific

SeverityMedium

Fix difficultyIntermediate

AreaVehicle speed, idle control and auxiliary inputs

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