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P1650 Mercury Code - Power Steering Pressure Switch Out of Self-Test Range

Quick Answer

The P1650 diagnostic trouble code (DTC) for Mercury vehicles refers to the Power Steering Pressure Switch being out of the self-test range. Common causes include Faulty power steering pressure switch: The switch itself may be malfunctioning, causing inaccurate readings to be sent to the ECM, Power steering fluid issues: Low or contaminated power steering fluid can affect the pressure levels in the system, triggering the code, Wiring or connection problems: Corrosion, damage, or poor connections in the wiring harness related to the power steering pressure switch can cause communication issues. 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
P1650 Mercury indicates Power Steering Pressure Switch Out of Self-Test Range.
Common causes
Common causes include Faulty power steering pressure switch: The switch itself may be malfunctioning, causing inaccurate readings to be sent to the ECM, Power steering fluid issues: Low or contaminated power steering fluid can affect the pressure levels in the system, triggering the code, Wiring or connection problems: Corrosion, damage, or poor connections in the wiring harness related to the power steering pressure switch can cause communication issues.
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 Aug 25, 2024
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Code P1650 Mercury Description

The P1650 diagnostic trouble code (DTC) for Mercury vehicles refers to the Power Steering Pressure Switch being out of the self-test range. This code indicates that the power steering system is not functioning within the expected parameters set by the vehicle's onboard computer. The power steering pressure switch is responsible for monitoring the pressure within the power steering system and sending feedback to the engine control module (ECM) to ensure optimal performance. When the switch is out of the self-test range, it can lead to issues with the power steering system, affecting the vehicle's handling and safety.

OBDII Code P1650 Mercury - Power Steering Pressure Switch Out of Self-Test Range
P1650 Mercury Code - Power Steering Pressure Switch Out of Self-Test Range

Common Causes of P1650 Mercury

  1. Faulty power steering pressure switch: The switch itself may be malfunctioning, causing inaccurate readings to be sent to the ECM.
  2. Power steering fluid issues: Low or contaminated power steering fluid can affect the pressure levels in the system, triggering the code.
  3. Wiring or connection problems: Corrosion, damage, or poor connections in the wiring harness related to the power steering pressure switch can cause communication issues.
  4. ECM malfunction: A problem with the engine control module may prevent it from receiving accurate data from the power steering pressure switch.

Symptoms of P1650 Mercury

  1. Difficulty steering: The power steering system may feel stiff or unresponsive, making it harder to turn the steering wheel.
  2. Power steering fluid leaks: There may be visible leaks of power steering fluid under the vehicle or around the power steering components.
  3. Dashboard warning light: The vehicle's dashboard may illuminate a warning light indicating a power steering system malfunction.
  4. Noisy power steering: The power steering system may produce unusual noises such as whining or groaning when turning the steering wheel.

How to Fix P1650 Mercury

  1. Diagnose the issue: Use a diagnostic scanner to retrieve the specific DTC, check the power steering pressure switch, and inspect the power steering system for any visible issues.
  2. Replace the power steering pressure switch: If the switch is found to be faulty, it should be replaced with a new one that meets the manufacturer's specifications.
  3. Flush and refill power steering fluid: Ensure the power steering fluid is at the correct level, clean, and free of contaminants to prevent further issues.
  4. Check and repair wiring connections: Inspect the wiring harness for any damage or corrosion, and repair or replace as needed to ensure proper communication between components.

Cost to Fix P1650 Mercury

The typical repair costs for addressing a P1650 code on a Mercury vehicle can range from $150 to $400, including parts and labor. However, the final cost may vary depending on the specific vehicle model, location, and labor rates at the auto repair shop. It's recommended to consult with a professional mechanic for an accurate estimate based on the individual circumstances.

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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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