AutoCodes – Ford – P1477 2011 Ford Fusion

P1477 2011 Ford Fusion Code - Medium Cooling Fan Control Primary Circuit Failure

Quick Answer

Monitors the medium fan control (MFC) primary circuit output from the Powertrain Control Module (PCM). Common causes include Faulty Cooling Fan Relay, Cooling Fan Relay harness is open or shorted, Cooling Fan 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: P1477 2011 Ford Fusion indicates Medium Cooling Fan Control Primary Circuit Failure.
Common causes: Common causes include Faulty Cooling Fan Relay, Cooling Fan Relay harness is open or shorted, Cooling Fan 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 1,685

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 Aug 24, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1477 2011 Ford Fusion Description

Monitors the medium fan control (MFC) primary circuit output from the Powertrain Control Module (PCM). The test fails if: With the MFC output commanded on (grounded), excessive current draw is detected on the MFC circuit; or with the MFC circuit commanded off, voltage is not detected on the MFC circuit (the PCM expects to detect IGN START/RUN voltage coming through the medium speed FC relay coil to the MFC circuit).

OBDII Code P1477 2011 Ford Fusion - Medium Cooling Fan Control Primary Circuit Failure - AutoCodes.com — P1477 2011 Ford Fusion Code - Medium Cooling Fan Control Primary Circuit Failure

What does this mean?

What are the Possible Causes of the DTC P1477 2011 Ford Fusion?

Faulty Cooling Fan Relay
Cooling Fan Relay harness is open or shorted
Cooling Fan Relay circuit poor electrical connection
Faulty Powertrain Control Module (PCM)

How to Fix the DTC P1477 2011 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 is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P1477 2011 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 P1477 2011 Ford Fusion code?

Need more information on how to fix the P1477 2011 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 P1477 2011 Ford Fusion Code

1. What does the OBDII code P1477 mean for a 2011 Ford Fusion?

The P1477 code indicates a failure in the medium cooling fan control primary circuit, meaning the vehicle's computer cannot properly regulate the cooling fan's operation.

2. What are the symptoms of the P1477 code in a 2011 Ford Fusion?

Common symptoms include engine overheating, the cooling fan not operating or running constantly, and possibly an illuminated Check Engine Light.

3. What causes the P1477 code to appear?

Potential causes include a faulty cooling fan motor, damaged wiring in the fan control circuit, a defective cooling fan relay, or a malfunctioning Powertrain Control Module (PCM).

4. Can I drive my 2011 Ford Fusion with a P1477 code?

Itâ€™s not recommended to drive with this code, as it may lead to engine overheating and further damage if the cooling fan is not functioning properly.

5. How do I diagnose the P1477 code in my Ford Fusion?

Diagnosis typically involves inspecting the cooling fan motor, checking the wiring and connectors for damage, testing the cooling fan relay, and using a multimeter to verify circuit continuity.

6. How can I fix the P1477 code on my 2011 Ford Fusion?

Repairs may include replacing a faulty cooling fan motor, repairing damaged wiring, replacing a defective cooling fan relay, or reprogramming or replacing the PCM if necessary.

7. How much does it cost to fix the P1477 code?

The repair cost can vary, but replacing a cooling fan motor may cost $300-$600, while relay or wiring repairs could be less expensive, depending on the extent of the damage.

8. Can a dirty cooling fan cause the P1477 code?

While dirt or debris can impede fan operation, the P1477 code is typically caused by an electrical issue, not physical obstruction.

9. Will clearing the P1477 code fix the problem?

Clearing the code may temporarily turn off the Check Engine Light, but the underlying issue in the cooling fan control circuit must be addressed to prevent the code from returning.

10. Do I need professional help to fix the P1477 code?

If youâ€™re experienced with automotive electrical systems, you can attempt the repair yourself. Otherwise, itâ€™s best to consult a professional mechanic to avoid further damage.