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Engine-Codes – Mercury – P1466 Mercury

P1466 Mercury Code - A/C Refrigerant Temperature Sensor/Circuit Malfunction

Quick Answer

The P1466 diagnostic trouble code (DTC) for Mercury vehicles indicates a malfunction in the A/C refrigerant temperature sensor or its circuit. Common causes include Faulty A/C refrigerant temperature sensor, Damaged wiring or connectors in the sensor circuit, Issues with the A/C control module. 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
P1466 Mercury indicates A/C Refrigerant Temperature Sensor/Circuit Malfunction.
Common causes
Common causes include Faulty A/C refrigerant temperature sensor, Damaged wiring or connectors in the sensor circuit, Issues with the A/C control module.
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 10, 2024
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Code P1466 Mercury Description

The P1466 diagnostic trouble code (DTC) for Mercury vehicles indicates a malfunction in the A/C refrigerant temperature sensor or its circuit. The A/C refrigerant temperature sensor is a crucial component of the vehicle's air conditioning system, responsible for measuring the temperature of the refrigerant to ensure optimal cooling performance. When this sensor or its circuit fails, it can lead to various issues with the vehicle's A/C system, affecting the overall comfort and functionality of the HVAC system.

OBDII Code P1466 Mercury - A/C Refrigerant Temperature Sensor/Circuit Malfunction
P1466 Mercury Code - A/C Refrigerant Temperature Sensor/Circuit Malfunction

Common Causes of P1466 Mercury

  1. Faulty A/C refrigerant temperature sensor
  2. Damaged wiring or connectors in the sensor circuit
  3. Issues with the A/C control module
  4. Low refrigerant levels in the A/C system
  5. Electrical issues within the A/C system

Symptoms of P1466 Mercury

  1. Inconsistent cooling performance from the A/C system
  2. A/C system not cooling as effectively as before
  3. A/C system blowing warm air
  4. A/C system turning on and off intermittently
  5. Malfunction indicator light (MIL) illuminated on the dashboard

How to Fix P1466 Mercury

  1. Diagnose the P1466 code using a diagnostic scanner to confirm the A/C refrigerant temperature sensor/circuit malfunction.
  2. Inspect the A/C refrigerant temperature sensor, wiring, and connectors for any visible damage or corrosion.
  3. Test the A/C refrigerant temperature sensor using a multimeter to verify its functionality.
  4. Replace the A/C refrigerant temperature sensor if it is found to be faulty.
  5. Clear the DTC and test the A/C system to ensure proper operation after the repair.

Cost to Fix P1466 Mercury

The typical repair costs for addressing a P1466 code related to the A/C refrigerant temperature sensor/circuit malfunction can vary depending on the specific cause of the issue and the labor rates at auto repair shops. In general, the cost of replacing the A/C refrigerant temperature sensor and addressing related issues can range from $150 to $300, including parts and labor. However, it is advisable to check with local auto repair shops for more accurate estimates based on your vehicle's make and model, as well as the extent of the repair needed. Keep in mind that diagnostic time and labor rates can vary between different locations and service providers.

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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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