P1477 2003 Ford F150 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 2003 Ford F150 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.
Code P1477 2003 Ford F150 Description
What are the Possible Causes of the DTC P1477 2003 Ford F150?
- 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 2003 Ford F150?
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 2003 Ford F150 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 P1477 2003 Ford F150 Code
1. What are the common symptoms of OBDII code P1477 in a 2003 Ford F150?
- Common symptoms include the cooling fan running constantly or not operating at all, engine overheating, and a check engine light illuminated on the dashboard.
2. What are the possible causes of OBDII code P1477 in a 2003 Ford F150?
- Possible causes may include a faulty cooling fan relay, a malfunctioning cooling fan motor, damaged wiring or connectors in the cooling fan circuit, or a problem with the engine control module (ECM).
3. How can I diagnose the issue related to OBDII code P1477 in my 2003 Ford F150?
- Diagnosis typically involves checking the cooling fan relay and motor for proper operation, inspecting the wiring and connectors for damage or loose connections, and testing the ECM for any faults using a diagnostic scanner.
4. Can I still drive my 2003 Ford F150 with OBDII code P1477?
- It is not recommended to drive the vehicle with this code present, as it can lead to engine overheating and potential damage. It is best to address the issue promptly to avoid further complications.
5. What are the repair options for fixing OBDII code P1477 in a 2003 Ford F150?
- Repair options may include replacing the cooling fan relay, fixing any wiring or connector issues, replacing the cooling fan motor if necessary, or reprogramming the ECM to resolve the circuit failure.
6. How much does it typically cost to repair OBDII code P1477 in a 2003 Ford F150?
- The cost of repair can vary depending on the specific issue causing the code. It may range from a relatively low cost for replacing a relay to a higher cost for replacing the cooling fan motor or addressing ECM problems.
7. Can I reset the OBDII code P1477 in my 2003 Ford F150 by disconnecting the battery?
- While disconnecting the battery may reset the code temporarily, it is not a recommended method for fixing the underlying issue. It is best to diagnose the problem and address it directly to prevent further occurrences of the code.
8. Will OBDII code P1477 cause my 2003 Ford F150 to fail an emissions test?
- Yes, this code can cause your vehicle to fail an emissions test due to the potential impact on engine performance and emissions control. It is important to resolve the issue before undergoing an emissions test.
9. How long does it typically take to repair OBDII code P1477 in a 2003 Ford F150?
- The repair time can vary based on the specific cause of the code and the complexity of the fix. It may range from a quick fix such as replacing a relay to a more involved repair requiring several hours of labor.
10. Is it possible to prevent OBDII code P1477 from occurring in my 2003 Ford F150?
- While some causes of this code may be unavoidable, regular maintenance of the cooling system, including checking the fan operation and monitoring coolant levels, can help prevent issues that lead to this code.
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