P0538 - A/C Evaporator Temperature Circuit High Input

Repair Importance Level: 1/3
Repair Difficulty Level: 3/3    What is this?
Table of contents

P0538 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

How do I fix code P0538?

Check the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.

Cost of diagnosing the P0538 code

Labor: 1.0

The cost of diagnosing the P0538 code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle's make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.

When is the code detected?

When the A/C Evaporator Temperature (ACET) sensor signal is high the Powertrain Control Module (PCM) will triggered the P0538 code.

Possible Symptoms

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

P0538 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).
OBDII Code P0538 - A/C Evaporator Temperature Circuit High Input - AutoCodes.com

P0538 More Information

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Information for specific makes

  • P0538 FORD A/C Evaporator Temperature Circuit High Input

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