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Engine-Codes – Ford – P0685 2007 Ford Fusion

P0685 2007 Ford Fusion Code - Powertrain Control Module Power Relay Control Circuit Open

Quick Answer

The P0685 code for a 2007 Ford Fusion indicates a problem with the Powertrain Control Module (PCM) Power Relay Control Circuit being open. Common causes include Damaged wiring or connectors in the power relay control circuit, Faulty power relay, Malfunctioning PCM. 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
P0685 2007 Ford Fusion indicates Powertrain Control Module Power Relay Control Circuit Open.
Common causes
Common causes include Damaged wiring or connectors in the power relay control circuit, Faulty power relay, Malfunctioning PCM.
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 15, 2024
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Code P0685 2007 Ford Fusion Description

The P0685 code for a 2007 Ford Fusion indicates a problem with the Powertrain Control Module (PCM) Power Relay Control Circuit being open. The PCM is a crucial component of the vehicle's engine management system, responsible for controlling various functions such as fuel injection, ignition timing, and emissions. The power relay control circuit is essential for providing power to the PCM, allowing it to function properly.

OBDII Code P0685 2007 Ford Fusion - Powertrain Control Module Power Relay Control Circuit Open
P0685 2007 Ford Fusion Code - Powertrain Control Module Power Relay Control Circuit Open

Common Causes of P0685 2007 Ford Fusion

  1. Damaged wiring or connectors in the power relay control circuit
  2. Faulty power relay
  3. Malfunctioning PCM
  4. Corrosion or loose connections in the electrical system
  5. Electrical short circuits

Symptoms of P0685 2007 Ford Fusion

  1. Engine misfires or runs rough
  2. Poor fuel efficiency
  3. Difficulty starting the engine
  4. Illumination of the Check Engine Light
  5. Loss of power while driving

How to Fix P0685 2007 Ford Fusion

  1. Begin by inspecting the wiring and connectors in the power relay control circuit for any signs of damage or corrosion. Repair or replace any faulty components as needed.
  2. Test the power relay to ensure it is functioning correctly. Replace the relay if it is found to be faulty.
  3. Check the PCM for any signs of damage or malfunction. If necessary, replace the PCM and reprogram it to match the vehicle's specifications.
  4. Clear the diagnostic trouble codes from the vehicle's memory using a scan tool.
  5. Test drive the vehicle to confirm that the issue has been resolved and that the symptoms associated with the P0685 code have been eliminated.

Cost to Fix P0685 2007 Ford Fusion

The typical repair costs for addressing a P0685 code on a 2007 Ford Fusion can range from $150 to $500, depending on the specific cause of the issue and the extent of the repairs needed. This estimate includes the cost of parts such as wiring, connectors, relays, and potentially a new PCM, as well as labor charges. It is important to note that the actual cost may vary based on factors such as the location of the repair shop, the make and model of the vehicle, and the type of engine. It is recommended to obtain quotes from local auto repair shops to get a more accurate estimate for this repair.

What does this mean?

Tech Notes for P0685 2007 Ford Fusion

Check all the Engine Control Module (ECM) fuses, if the fuses are OK, then replacing the ECM relay should take care of the problem.

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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 P0685 2007 Ford Fusion Code

1. What are the common symptoms of OBDII code P0685 in a 2007 Ford Fusion?

The common symptoms of code P0685 in a 2007 Ford Fusion include engine stalling, difficulty starting the vehicle, and potential loss of power.

2. What does the OBDII code P0685 for a 2007 Ford Fusion indicate?

OBDII code P0685 in a 2007 Ford Fusion indicates a problem with the Powertrain Control Module Power Relay Control Circuit being open, meaning there is a malfunction in the relay control circuit.

3. What are the possible causes of OBDII code P0685 in a 2007 Ford Fusion?

Possible causes of code P0685 in a 2007 Ford Fusion include a faulty power relay, damaged wiring or connectors in the power relay circuit, or a defective Powertrain Control Module.

4. How do I diagnose the issue causing OBDII code P0685 in my 2007 Ford Fusion?

To diagnose the issue causing code P0685 in a 2007 Ford Fusion, you will need to perform a thorough inspection of the power relay, check for any damaged wiring or connectors, and use a multimeter to test the continuity and voltage in the circuit.

5. Can I still drive my 2007 Ford Fusion with OBDII code P0685?

It is not recommended to drive your 2007 Ford Fusion with OBDII code P0685, as it can lead to further damage to the vehicle and potentially unsafe driving conditions.

6. How can I repair OBDII code P0685 in my 2007 Ford Fusion?

To repair code P0685 in a 2007 Ford Fusion, you may need to replace the faulty power relay, repair any damaged wiring or connectors, or potentially replace the Powertrain Control Module if it is found to be defective.

7. Is it possible to reset OBDII code P0685 in a 2007 Ford Fusion without fixing the underlying issue?

Resetting the OBDII code P0685 in a 2007 Ford Fusion without fixing the underlying issue will only temporarily clear the code, and the issue is likely to resurface. It is important to address the root cause of the problem for a permanent solution.

8. Can a DIY enthusiast fix OBDII code P0685 in a 2007 Ford Fusion?

A DIY enthusiast with the necessary tools and knowledge of automotive electrical systems may be able to diagnose and repair OBDII code P0685 in a 2007 Ford Fusion, but it is recommended to seek professional help if unsure.

9. Will OBDII code P0685 cause my 2007 Ford Fusion to fail an emissions test?

Yes, OBDII code P0685 in a 2007 Ford Fusion can cause the vehicle to fail an emissions test, as it indicates a malfunction in the Powertrain Control Module Power Relay Control Circuit, affecting the vehicle's emissions control system.

10. How much does it cost to repair OBDII code P0685 in a 2007 Ford Fusion at a mechanic?

The cost to repair OBDII code P0685 in a 2007 Ford Fusion at a mechanic can vary depending on the root cause of the issue, but it may range from $150 to $500 or more, including parts and labor.

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