Engine-CodesMercury – P1565 Mercury

P1565 Mercury Code - Speed Control Command Switch Out of Range High

Quick Answer

The P1565 diagnostic trouble code (DTC) for Mercury vehicles indicates that the Speed Control Command Switch is out of range high. Common causes include Faulty speed control switch, Wiring issues such as shorts or open circuits, Corrosion in the electrical connections. Severity is Moderate - service should be scheduled soon. The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.

What it means
P1565 Mercury indicates Speed Control Command Switch Out of Range High.
Common causes
Common causes include Faulty speed control switch, Wiring issues such as shorts or open circuits, Corrosion in the electrical connections.
Severity
Moderate - service should be scheduled soon.
Can I drive?
The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.
Table of contents Created and updated by William Orellana on Aug 25, 2024
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Code P1565 Mercury Description

The P1565 diagnostic trouble code (DTC) for Mercury vehicles indicates that the Speed Control Command Switch is out of range high. This means that the vehicle's onboard computer has detected a signal from the speed control switch that is higher than the acceptable range. The speed control system, also known as cruise control, may not function properly with this issue. The speed control switch is responsible for sending signals to the vehicle's computer to set and maintain the desired speed.

OBDII Code P1565 Mercury - Speed Control Command Switch Out of Range High
P1565 Mercury Code - Speed Control Command Switch Out of Range High

Common Causes of P1565 Mercury

  1. Faulty speed control switch
  2. Wiring issues such as shorts or open circuits
  3. Corrosion in the electrical connections
  4. Malfunctioning vehicle speed sensor
  5. Problems with the vehicle's computer system

Symptoms of P1565 Mercury

  1. Inoperative cruise control system
  2. Cruise control system engaging at incorrect speeds
  3. Illumination of the check engine light
  4. Erratic speedometer readings
  5. Difficulty setting or maintaining a constant speed

How to Fix P1565 Mercury

  1. Perform a diagnostic scan to confirm the P1565 code and identify the exact cause of the issue.
  2. Inspect the speed control switch and wiring for any visible damage or corrosion.
  3. Test the vehicle speed sensor and related components for proper functionality.
  4. Repair or replace any faulty components such as the speed control switch, wiring, or speed sensor.
  5. Clear the DTC and test drive the vehicle to ensure the issue has been resolved.

Cost to Fix P1565 Mercury

The typical repair costs for addressing a P1565 code on a Mercury vehicle can range from $100 to $300, depending on the specific cause of the issue and the cost of replacement parts. It's important to consider that labor rates at auto repair shops can vary, so it's recommended to check with local shops for a more accurate estimate.

When is the Code Detected?

The Engine Control Module (ECM) has detected a fault in the cruise control circuit

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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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