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P0689 2011 Ford Fusion Code - Electronic Control Module Power Relay Sense Circuit Low

Quick Answer

The P0689 code for a 2011 Ford Fusion indicates a problem with the Electronic Control Module (ECM) Power Relay Sense Circuit being low. Common causes include Faulty ECM Power Relay: A malfunctioning ECM power relay can cause the voltage level in the sense circuit to drop, triggering this code, Damaged Wiring or Connectors: Corrosion, fraying, or damage to the wiring or connectors in the power relay sense circuit can disrupt the voltage levels, ECM Malfunction: A faulty ECM itself can also be the root cause of the issue, preventing it from receiving the necessary power. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means
P0689 2011 Ford Fusion indicates Electronic Control Module Power Relay Sense Circuit Low.
Common causes
Common causes include Faulty ECM Power Relay: A malfunctioning ECM power relay can cause the voltage level in the sense circuit to drop, triggering this code, Damaged Wiring or Connectors: Corrosion, fraying, or damage to the wiring or connectors in the power relay sense circuit can disrupt the voltage levels, ECM Malfunction: A faulty ECM itself can also be the root cause of the issue, preventing it from receiving the necessary power.
Severity
High - diagnose this code as soon as possible.
Can I drive?
Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
What is this?
Table of contents Created and updated by William Orellana on Sep 17, 2024
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Code P0689 2011 Ford Fusion Description

The P0689 code for a 2011 Ford Fusion indicates a problem with the Electronic Control Module (ECM) Power Relay Sense Circuit being low. The ECM, also known as the engine control module, is a crucial component that controls various functions in the vehicle, such as fuel injection, ignition timing, and emissions control. The power relay sense circuit is responsible for monitoring the voltage level of the ECM power relay, ensuring that it is functioning correctly.

OBDII Code P0689 2011 Ford Fusion - Electronic Control Module Power Relay Sense Circuit Low
P0689 2011 Ford Fusion Code - Electronic Control Module Power Relay Sense Circuit Low

Common Causes of P0689 2011 Ford Fusion

  1. Faulty ECM Power Relay: A malfunctioning ECM power relay can cause the voltage level in the sense circuit to drop, triggering this code.
  2. Damaged Wiring or Connectors: Corrosion, fraying, or damage to the wiring or connectors in the power relay sense circuit can disrupt the voltage levels.
  3. ECM Malfunction: A faulty ECM itself can also be the root cause of the issue, preventing it from receiving the necessary power.
  4. Electrical Issues: Any electrical issues within the vehicle's system, such as a weak battery or alternator, can affect the voltage levels in the power relay sense circuit.

Symptoms of P0689 2011 Ford Fusion

  1. Check Engine Light: The most common symptom associated with this code is the illumination of the check engine light on the dashboard.
  2. Engine Misfires: The vehicle may experience engine misfires, hesitation, or rough idling due to the ECM not receiving the proper power.
  3. Poor Fuel Efficiency: A decrease in fuel efficiency may be noticed as a result of the ECM not functioning correctly.
  4. Stalling: The vehicle may stall unexpectedly, especially at idle or low speeds, due to the ECM power relay sense circuit issue.

How to Fix P0689 2011 Ford Fusion

  1. Diagnose the Issue: Use a diagnostic scanner to retrieve the trouble code and perform a thorough inspection of the ECM power relay and sense circuit.
  2. Test the ECM Power Relay: Check the ECM power relay for proper functionality and replace it if necessary.
  3. Inspect Wiring and Connectors: Examine the wiring and connectors in the power relay sense circuit for any damage or corrosion, repairing or replacing as needed.
  4. Check ECM Functionality: Test the ECM to ensure it is functioning correctly and replace it if it is found to be faulty.
  5. Clear Codes and Test Drive: Clear the trouble codes from the vehicle's computer, then test drive the vehicle to confirm that the issue has been resolved.

Cost to Fix P0689 2011 Ford Fusion

The typical repair costs for addressing a P0689 code on a 2011 Ford Fusion can range from $150 to $400, depending on the specific cause of the issue and the parts needed for the repair. This estimate includes the cost of parts such as a new ECM power relay, wiring repairs, and potential ECM replacement, as well as labor costs. It's important to note that the actual repair costs can vary based on factors such as the location of the repair shop, the vehicle's make and model, and the extent of the repairs needed. It is recommended to consult with a qualified mechanic for a more accurate cost estimate based on your specific situation. Labor rates at auto repair shops typically range from $80 to $150 per hour, but rates may differ at dealerships or independent shops.

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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.

Frequently Asked Questions about P0689 2011 Ford Fusion Code

1. What are the common symptoms of OBDII code P0689 in a 2011 Ford Fusion?

The common symptoms of code P0689 in a 2011 Ford Fusion include the check engine light illuminating on the dashboard, engine stalling or hesitation, and difficulty starting the vehicle.

2. What does the OBDII code P0689 for a 2011 Ford Fusion indicate?

Code P0689 indicates a problem with the Electronic Control Module (ECM) Power Relay Sense Circuit being lower than the normal operating range.

3. What are the possible causes of OBDII code P0689 in a 2011 Ford Fusion?

Possible causes of code P0689 in a 2011 Ford Fusion include a faulty ECM power relay, damaged wiring or connectors in the power relay sense circuit, or a malfunctioning ECM.

4. How can I diagnose the issue related to OBDII code P0689 in my 2011 Ford Fusion?

To diagnose the issue related to code P0689, you can use a diagnostic scanner to retrieve the trouble codes, inspect the ECM power relay and related wiring, and perform a continuity test on the power relay sense circuit.

5. Can I drive my 2011 Ford Fusion with OBDII code P0689?

It is not recommended to drive your 2011 Ford Fusion with code P0689 present as it can lead to further damage to the electronic control system and potential safety issues.

6. How can I repair OBDII code P0689 in my 2011 Ford Fusion?

Repairing code P0689 in a 2011 Ford Fusion involves replacing the faulty ECM power relay, repairing any damaged wiring or connectors in the power relay sense circuit, and clearing the trouble codes with a diagnostic scanner.

7. Is it safe to reset the OBDII code P0689 in a 2011 Ford Fusion and continue driving?

Resetting the code without addressing the underlying issue is not recommended as the problem may persist, leading to potential safety hazards and engine performance issues.

8. Can a DIY enthusiast fix the OBDII code P0689 in a 2011 Ford Fusion?

While some DIY enthusiasts may be able to address simple issues related to code P0689, complex electrical repairs involving the ECM and power relay may require professional expertise.

9. Will OBDII code P0689 cause permanent damage to my 2011 Ford Fusion if left unattended?

Leaving code P0689 unattended in your 2011 Ford Fusion can potentially cause permanent damage to the ECM and other electronic components, leading to costly repairs in the future.

10. How much can I expect to pay for repairing OBDII code P0689 in a 2011 Ford Fusion at a repair shop?

The cost of repairing code P0689 in a 2011 Ford Fusion at a repair shop can vary depending on the extent of the issue, but it may range from $200 to $500 including parts and labor.

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