P0685 2009 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 2009 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.
Code P0685 2009 Ford Fusion Description
What are the Possible Causes of the DTC P0685 2009 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 2009 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.
Code Tech Notes
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P0685 2009 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.
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Frequently Asked Questions about P0685 2009 Ford Fusion Code
What does OBDII code P0685 mean for a 2009 Ford Fusion?
P0685 indicates an open circuit in the power relay control circuit for the Powertrain Control Module (PCM).
What are the symptoms of code P0685 in a 2009 Ford Fusion?
Common symptoms include engine stalling, failure to start, or intermittent power loss to the PCM.
What causes code P0685 in a 2009 Ford Fusion?
Possible causes include a faulty PCM power relay, damaged wiring or connectors in the control circuit, or a defective PCM.
How can I diagnose code P0685 in my 2009 Ford Fusion?
Start by inspecting the PCM power relay, wiring, and connectors for damage or corrosion. Test relay function and check for circuit continuity.
Can a faulty PCM cause code P0685?
Yes, a defective PCM can cause this code, but it’s less common than issues with the relay or wiring.
Is it safe to drive a 2009 Ford Fusion with code P0685?
Driving may be unsafe as the engine could stall or lose power unexpectedly. Address the issue promptly.
How do I fix code P0685 on a 2009 Ford Fusion?
Repairs may include replacing the PCM power relay, repairing damaged wiring, or replacing the PCM if necessary.
How much does it cost to fix code P0685 in a Ford Fusion?
Costs vary depending on the issue, but replacing a power relay typically costs $50-$100, while PCM replacement can range from $500-$1,500.
Can I clear code P0685 without fixing the problem?
Clearing the code without identifying and fixing the root cause will likely result in the code returning.
Do I need special tools to fix code P0685 on a 2009 Ford Fusion?
Basic tools like a multimeter and OBDII scanner are helpful for diagnostics, but advanced repairs may require professional equipment.
Discuss the causes and fixes for P0685 2009 Ford Fusion OBDII Code
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