AutoCodes – Ford – P0685 2012 Ford Fusion

P0685 2012 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 2012 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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 4,891

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
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code P0685 2012 Ford Fusion Description

OBDII Code P0685 2012 Ford Fusion - Powertrain Control Module Power Relay Control Circuit Open - AutoCodes.com — P0685 2012 Ford Fusion Code - Powertrain Control Module Power Relay Control Circuit Open

What does this mean?

What are the Possible Causes of the DTC P0685 2012 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 2012 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 2012 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 2012 Ford Fusion code?

Need more information on how to fix the P0685 2012 Ford Fusion code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0685 2012 Ford Fusion code diagnosed by a professional: Find a repair shop in your area

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 2012 Ford Fusion Code

1. What does the OBDII code P0685 on a 2012 Ford Fusion indicate?

The code P0685 in a 2012 Ford Fusion signifies a Powertrain Control Module (PCM) Power Relay Control Circuit Open.

2. What are the common symptoms of the P0685 code in a 2012 Ford Fusion?

Common symptoms of the P0685 code may include engine stalling, rough idling, difficulty starting the vehicle, and in some cases, the engine may not start at all.

3. What are the possible causes of the P0685 code in a 2012 Ford Fusion?

Potential causes of the P0685 code include a faulty power relay, damaged wiring or connectors in the power relay circuit, a defective PCM, or a blown fuse related to the power relay.

4. How can I diagnose the P0685 code on my 2012 Ford Fusion?

Diagnosing the P0685 code involves inspecting the power relay, checking the wiring and connectors in the power relay circuit for damage, testing the voltage at the relay, and scanning the PCM for any related trouble codes.

5. Can I still drive my 2012 Ford Fusion with the P0685 code present?

It is not recommended to drive your vehicle with the P0685 code active, as it can lead to further damage to the engine or electrical system. It's best to address the issue promptly.

6. How can I repair the P0685 code on my 2012 Ford Fusion?

To repair the P0685 code, you may need to replace the faulty power relay, repair any damaged wiring or connectors, replace a defective PCM if necessary, and ensure all related fuses are in proper working condition.

7. Is it possible to reset the P0685 code in a 2012 Ford Fusion without making any repairs?

While clearing the code may temporarily turn off the check engine light, it is crucial to address the underlying issue causing the P0685 code to prevent further problems with your vehicle.

8. Will the P0685 code in a 2012 Ford Fusion cause poor fuel efficiency?

The P0685 code itself may not directly impact fuel efficiency, but if left unresolved, it can lead to engine performance issues that might affect the fuel economy of your Ford Fusion.

9. Can a DIY enthusiast fix the P0685 code on a 2012 Ford Fusion?

Depending on your mechanical skills and access to tools, a DIY enthusiast may be able to address the P0685 code by following proper diagnostic procedures and making necessary repairs like replacing the power relay.

10. How much can I expect to pay to fix the P0685 code on a 2012 Ford Fusion at a repair shop?

The cost of fixing the P0685 code can vary based on the root cause of the issue and local labor rates. It's advisable to consult a trusted mechanic for an accurate estimate of repair costs.