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Engine-Codes – Generic – P1437

P1437 Code - A/C Evaporator Air Temperature Circuit High

Quick Answer

The P1437 code indicates that there is a problem with the A/C evaporator air temperature circuit being too high. Common causes include Faulty A/C evaporator temperature sensor, Wiring or connector issues in the A/C evaporator air temperature circuit, A/C control module malfunction. 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
P1437 indicates A/C Evaporator Air Temperature Circuit High.
Common causes
Common causes include Faulty A/C evaporator temperature sensor, Wiring or connector issues in the A/C evaporator air temperature circuit, A/C control module malfunction.
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 08, 2024
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Code P1437 Description

The P1437 code indicates that there is a problem with the A/C evaporator air temperature circuit being too high. The A/C evaporator is responsible for cooling the air before it enters the vehicle's cabin. When this circuit detects a high temperature, it can result in the A/C system not functioning properly, leading to insufficient cooling of the air inside the cabin. This can cause discomfort for the passengers and reduce the overall effectiveness of the A/C system.

OBDII Code P1437 - A/C Evaporator Air Temperature Circuit High
P1437 Code - A/C Evaporator Air Temperature Circuit High

Common Causes of P1437

  1. Faulty A/C evaporator temperature sensor
  2. Wiring or connector issues in the A/C evaporator air temperature circuit
  3. A/C control module malfunction
  4. Low refrigerant levels in the A/C system
  5. Electrical issues in the A/C system

Symptoms of P1437

  1. Reduced cooling efficiency from the A/C system
  2. Fluctuating air temperature coming from the vents
  3. A/C system not cooling the cabin as effectively as before
  4. A/C system blowing warm air intermittently
  5. Malfunction indicator light (MIL) illuminated on the dashboard

How to Fix P1437

  1. Use an OBD-II scanner to read the code and determine the exact cause of the issue.
  2. Inspect the A/C evaporator temperature sensor and the wiring for any visible damage or corrosion.
  3. Test the A/C control module for proper operation and replace if necessary.
  4. Recharge the A/C system with refrigerant if low levels are detected.
  5. Clear the code and test the A/C system to ensure proper cooling function.

Cost to Fix P1437

The cost of repairing the A/C evaporator air temperature circuit high issue can vary depending on the specific cause of the problem. Typically, the cost of parts for this repair can range from $50 to $200, while the labor costs can be anywhere from $100 to $300. Overall, the total repair cost could be between $150 to $500. It is important to note that these are rough estimates, and actual costs may vary based on the factors mentioned earlier. It is advisable to consult with a professional mechanic for a more accurate cost estimate.

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Code P1437 Information for Specific Makes

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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