AutoCodes – Ford – P1477 2008 Ford Fusion

P1477 2008 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 2008 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.
AI answers can be wrong. Verify repairs with testing. Open full chat
Code Popularity 1,519
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Aug 24, 2019
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Code P1477 2008 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 2008 Ford Fusion - Medium Cooling Fan Control Primary Circuit Failure - AutoCodes.com
P1477 2008 Ford Fusion Code - Medium Cooling Fan Control Primary Circuit Failure

What are the Possible Causes of the DTC P1477 2008 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 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 is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P1477 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 P1477 2008 Ford Fusion code?

Need more information on how to fix the P1477 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 P1477 2008 Ford Fusion Code

1. What are the common symptoms of OBDII code P1477 in a 2008 Ford Fusion?

The common symptoms of code P1477 in a 2008 Ford Fusion include overheating, poor air conditioning performance, and the cooling fan running continuously or not at all.

2. What can cause the OBDII code P1477 in a 2008 Ford Fusion?

The most common cause of code P1477 in a 2008 Ford Fusion is a malfunction in the cooling fan control primary circuit, which can be due to a faulty cooling fan relay, wiring issue, or a defective cooling fan motor.

3. How can I diagnose the OBDII code P1477 in my 2008 Ford Fusion?

Diagnosing code P1477 in a 2008 Ford Fusion involves checking the cooling fan relay, inspecting the wiring for any damage or loose connections, and testing the cooling fan motor for proper function using a multimeter.

4. Can I still drive my 2008 Ford Fusion with OBDII code P1477?

It is not recommended to drive your 2008 Ford Fusion with code P1477, as it could lead to engine overheating and potential damage. It is best to address the issue promptly to prevent further complications.

5. How do I repair OBDII code P1477 in my 2008 Ford Fusion?

To repair code P1477 in a 2008 Ford Fusion, you may need to replace the cooling fan relay, repair any damaged wiring, or replace the cooling fan motor if it is found to be defective during diagnosis.

6. Can a DIY enthusiast fix OBDII code P1477 in a 2008 Ford Fusion?

If you have experience working on automotive electrical systems, you may be able to diagnose and repair code P1477 in your 2008 Ford Fusion. However, it's always recommended to consult a professional if you're not familiar with the repair process.

7. How much does it cost to fix OBDII code P1477 in a 2008 Ford Fusion?

The cost of fixing code P1477 in a 2008 Ford Fusion can vary depending on the underlying cause and the repair method chosen. Costs may include parts such as a cooling fan relay or motor, as well as labor if you opt for professional repair services.

8. Will resetting the OBDII code P1477 in my 2008 Ford Fusion make it go away permanently?

Resetting the OBDII code P1477 in your 2008 Ford Fusion may temporarily clear the code, but if the underlying issue is not addressed, the code is likely to reappear. It's important to diagnose and repair the root cause of the code to prevent future occurrences.

9. Is OBDII code P1477 a common issue in 2008 Ford Fusion vehicles?

While OBDII code P1477 is not as common as some other codes, it can still occur in 2008 Ford Fusion vehicles due to issues with the cooling fan control circuit. Regular maintenance and prompt repairs can help prevent this code from appearing.

10. Can OBDII code P1477 in a 2008 Ford Fusion cause engine damage if left untreated?

If left untreated, OBDII code P1477 in a 2008 Ford Fusion can lead to engine overheating, which may cause damage to engine components. It's important to address this code promptly to prevent any potential engine damage.

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