Engine-CodesMercury – P1651 Mercury

P1651 Mercury Code - Power Steering Pressure Switch Input Malfunction

Quick Answer

The P1651 diagnostic trouble code for Mercury vehicles indicates a malfunction in the power steering pressure switch input. Common causes include Faulty power steering pressure switch, Wiring or connector issues in the power steering pressure switch circuit, Low power steering fluid levels. 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
P1651 Mercury indicates Power Steering Pressure Switch Input Malfunction.
Common causes
Common causes include Faulty power steering pressure switch, Wiring or connector issues in the power steering pressure switch circuit, Low power steering fluid levels.
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.
Table of contents Created and updated by William Orellana on Aug 25, 2024
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Code P1651 Mercury Description

The P1651 diagnostic trouble code for Mercury vehicles indicates a malfunction in the power steering pressure switch input. This switch is responsible for monitoring the pressure in the power steering system and transmitting this information to the vehicle's engine control module (ECM). When the ECM detects a discrepancy or irregularity in the signal from the power steering pressure switch, it triggers the P1651 code.

OBDII Code P1651 Mercury - Power Steering Pressure Switch Input Malfunction
P1651 Mercury Code - Power Steering Pressure Switch Input Malfunction

Common Causes of P1651 Mercury

  1. Faulty power steering pressure switch
  2. Wiring or connector issues in the power steering pressure switch circuit
  3. Low power steering fluid levels
  4. Power steering pump failure
  5. ECM malfunction

Symptoms of P1651 Mercury

  1. Stiff or heavy steering
  2. Jerky or unpredictable steering response
  3. Power steering failure
  4. Illumination of the power steering warning light on the dashboard

How to Fix P1651 Mercury

  1. Begin by diagnosing the power steering pressure switch using a scan tool to verify the P1651 code.
  2. Inspect the wiring and connectors associated with the power steering pressure switch for any damage or corrosion. Repair or replace as necessary.
  3. Check the power steering fluid levels and top up if low. Inspect for any leaks in the system.
  4. Test the power steering pump for proper functioning and replace if necessary.
  5. Clear the fault codes and perform a test drive to ensure the issue has been resolved.

Cost to Fix P1651 Mercury

The typical repair costs for addressing a power steering pressure switch input malfunction can range from $150 to $400, depending on the specific cause of the issue and the cost of parts and labor in your area. It's recommended to consult with a qualified mechanic or auto repair shop to obtain an accurate estimate based on your vehicle's make and model. Keep in mind that labor rates can vary, so it's advisable to shop around for the best deal.

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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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