AutoCodes – Ford – P0685 2008 Ford Fusion

P0685 2008 Ford Fusion Code - Powertrain Control Module Power Relay Control Circuit Open

Quick Answer

This DTC sets when the ignition switch position run circuit indicates the ignition is in the OFF, ACC, or LOCK position, and the amount of time the Powertrain Control Module (PCM) remains powered through the PCM power relay exceeds a predetermined amount of time. Common causes include Faulty Powertrain Control Module (PCM) Power Relay, PCM Power Relay harness is open or shorted, PCM Power Relay circuit poor electrical connection. 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 2008 Ford Fusion indicates Powertrain Control Module Power Relay Control Circuit Open.
Common causes: Common causes include Faulty Powertrain Control Module (PCM) Power Relay, PCM Power Relay harness is open or shorted, PCM Power Relay circuit poor electrical connection.
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.

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Code Popularity 3,344

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on May 05, 2019

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P0685 2008 Ford Fusion Description

OBDII Code P0685 2008 Ford Fusion - Powertrain Control Module Power Relay Control Circuit Open - AutoCodes.com — P0685 2008 Ford Fusion Code - Powertrain Control Module Power Relay Control Circuit Open

What does this mean?

What are the Possible Causes of the DTC P0685 2008 Ford Fusion?

Faulty Powertrain Control Module (PCM) Power Relay
PCM Power Relay harness is open or shorted
PCM Power Relay circuit poor electrical connection
Blown PCM fuse
Faulty PCM

How to Fix the DTC P0685 2008 Ford Fusion?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What does this mean?

Code Tech Notes

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

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0685 2008 Ford Fusion code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the P0685 2008 Ford Fusion code?

Need more information on how to fix the P0685 2008 Ford Fusion code? Get Access to Factory Service Manuals

Need Help with the Code?

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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 2008 Ford Fusion Code

1. What are the common symptoms of OBDII code P0685 in a 2008 Ford Fusion?

- Common symptoms include the engine not starting, stalling, or running rough. The vehicle may also experience issues with the electrical system.

2. What does the OBDII code P0685 in a 2008 Ford Fusion indicate?

- This code indicates a problem with the Powertrain Control Module (PCM) power relay control circuit being open.

3. What are the possible causes of the OBDII code P0685 in a 2008 Ford Fusion?

- Potential causes include a faulty PCM power relay, damaged wiring or connectors in the power relay circuit, or a malfunctioning PCM.

4. How can I diagnose the OBDII code P0685 in my 2008 Ford Fusion?

- Diagnosing this code typically involves checking the power relay, inspecting the wiring and connectors in the circuit, and testing the PCM for any faults.

5. Can I still drive my 2008 Ford Fusion with the OBDII code P0685?

- It is not recommended to drive the vehicle with this code as it can lead to further damage or safety issues. It is best to address the underlying problem promptly.

6. How can I repair the OBDII code P0685 in my 2008 Ford Fusion?

- Repair options may include replacing the PCM power relay, repairing any damaged wiring or connectors, or replacing the PCM if necessary.

7. Is it safe to reset the OBDII code P0685 in my 2008 Ford Fusion using a diagnostic tool?

- While resetting the code may temporarily turn off the check engine light, it will not fix the underlying issue causing the code. It is important to diagnose and repair the problem to prevent future issues.

8. Can a DIY enthusiast fix the OBDII code P0685 in a 2008 Ford Fusion?

- Depending on your level of automotive expertise, it may be possible to address this code yourself by following repair guides and using the necessary tools. However, professional help is recommended for accurate diagnosis and repair.

9. How much can I expect to pay for repairing the OBDII code P0685 in a 2008 Ford Fusion?

- Repair costs can vary depending on the exact cause of the issue and whether you choose to do the repairs yourself or take the vehicle to a mechanic. Costs may include parts and labor.

10. Are there any preventive measures to avoid the OBDII code P0685 in a 2008 Ford Fusion?

- Regular maintenance, such as checking the electrical system components and keeping an eye on any warning signs, can help prevent issues leading to this code.