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P0537 Ford Code - A/C Evaporator Temperature Circuit Low Input

Quick Answer

The P0537 diagnostic trouble code (DTC) for Ford vehicles indicates a problem with the A/C evaporator temperature circuit having a low input. Common causes include Faulty A/C evaporator temperature sensor, Damaged or corroded wiring in the A/C evaporator temperature circuit, Low refrigerant levels in the A/C system. Severity is Low - monitor the vehicle and repair when practical. The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.

What it means
P0537 Ford indicates A/C Evaporator Temperature Circuit Low Input.
Common causes
Common causes include Faulty A/C evaporator temperature sensor, Damaged or corroded wiring in the A/C evaporator temperature circuit, Low refrigerant levels in the A/C system.
Severity
Low - monitor the vehicle and repair when practical.
Can I drive?
The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.
What is this?
Table of contents Created and updated by William Orellana on Sep 12, 2024
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Code P0537 Ford Description

The P0537 diagnostic trouble code (DTC) for Ford vehicles indicates a problem with the A/C evaporator temperature circuit having a low input. The A/C evaporator is a key component of the vehicle's air conditioning system, responsible for cooling and dehumidifying the air that enters the cabin. The evaporator temperature sensor is used to monitor the temperature of the A/C evaporator, ensuring that the system operates efficiently and effectively.

OBDII Code P0537 Ford - A/C Evaporator Temperature Circuit Low Input
P0537 Ford Code - A/C Evaporator Temperature Circuit Low Input

Common Causes of P0537 Ford

  1. Faulty A/C evaporator temperature sensor
  2. Damaged or corroded wiring in the A/C evaporator temperature circuit
  3. Low refrigerant levels in the A/C system
  4. Issues with the A/C compressor

Symptoms of P0537 Ford

  1. Lack of cold air coming from the A/C vents
  2. Inconsistent cooling performance
  3. A/C system may cycle on and off frequently
  4. Check Engine Light illuminated on the dashboard

How to Fix P0537 Ford

  1. Begin by diagnosing the specific cause of the P0537 code by using a scan tool to read the freeze frame data and any related codes stored in the PCM.
  2. Inspect the A/C evaporator temperature sensor and its wiring for any signs of damage or corrosion. Replace the sensor if necessary.
  3. Check the refrigerant levels in the A/C system and top up if low. Inspect for any leaks that may be causing the issue.
  4. Test the A/C system to ensure that the evaporator temperature readings are within the correct range after repairs are completed.
  5. Clear the DTC and reset the PCM to see if the P0537 code returns. If it does not, the issue has likely been resolved.

Cost to Fix P0537 Ford

The typical repair costs for addressing a P0537 code on a Ford vehicle can vary depending on the specific cause of the issue. In general, the cost of replacing the A/C evaporator temperature sensor and related parts can range from $100 to $300, while labor costs can add an additional $80 to $150 per hour. Keep in mind that diagnosis time and labor rates at auto repair shops can vary, so it's advisable to get a more precise estimate based on your location and vehicle details.

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Tech Notes for P0537 Ford









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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

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