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P1651 Lincoln Code - Power Steering Pressure Switch Input Malfunction

Quick Answer

The P1651 diagnostic trouble code (DTC) for Lincoln vehicles indicates a Power Steering Pressure Switch Input Malfunction. Common causes include Faulty power steering pressure switch, Wiring issues or loose connections in the power steering pressure switch circuit, ECM/PCM 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
P1651 Lincoln indicates Power Steering Pressure Switch Input Malfunction.
Common causes
Common causes include Faulty power steering pressure switch, Wiring issues or loose connections in the power steering pressure switch circuit, ECM/PCM 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 10, 2024
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Code P1651 Lincoln Description

The P1651 diagnostic trouble code (DTC) for Lincoln vehicles indicates a Power Steering Pressure Switch Input Malfunction. This means that there is an issue with the input signal from the power steering pressure switch to the vehicle's engine control module (ECM) or powertrain control module (PCM). The power steering pressure switch is responsible for monitoring the pressure in the power steering system and signaling the ECM/PCM to adjust engine performance accordingly. When this signal is not functioning correctly, it can lead to various performance issues and potentially impact the vehicle's overall drivability.

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

Common Causes of P1651 Lincoln

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

Symptoms of P1651 Lincoln

  1. Difficulty steering, especially at lower speeds
  2. Sluggish or unresponsive steering
  3. Illumination of the power steering warning light on the dashboard
  4. Engine stalling or hesitation when turning at low speeds
  5. Poor fuel efficiency

How to Fix P1651 Lincoln

  1. Begin by diagnosing the power steering pressure switch input circuit using a digital multimeter to check for continuity and proper voltage levels.
  2. Inspect the power steering pressure switch and associated wiring for any signs of damage or corrosion, replacing any faulty components as needed.
  3. Check and refill the power steering fluid to the proper levels, ensuring there are no leaks in the system.
  4. Clear the DTC from the ECM/PCM memory using a scan tool and perform a test drive to verify that the issue has been resolved.
  5. If the problem persists, further diagnosis may be necessary, including checking the ECM/PCM for any internal faults or consulting a professional mechanic for assistance.

Cost to Fix P1651 Lincoln

The typical repair costs for addressing a Power Steering Pressure Switch Input Malfunction can vary depending on the specific cause of the issue and the extent of the repairs needed. In general, the cost of parts for this repair can range from $50 to $200, while labor costs can vary between $100 and $300. Overall, the total repair costs may fall between $150 and $500, but it's important to note that prices can fluctuate based on location, vehicle make and model, and the rates of individual auto repair shops. It's recommended to obtain quotes from multiple shops and compare prices to ensure a fair and accurate estimate for this repair.

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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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