AutoCodes – Ford – P1479 2000 Ford F150

P1479 2000 Ford F150 Code - High Fan Control Primary Circuit

Quick Answer

Monitors the High Fan Control (HFC) primary circuit output from the Powertrain Control Module (PCM). Common causes include Faulty Cooling Fan, Cooling Fan harness is open or shorted, Cooling Fan 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: P1479 2000 Ford F150 indicates High Fan Control Primary Circuit.
Common causes: Common causes include Faulty Cooling Fan, Cooling Fan harness is open or shorted, Cooling Fan 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 1,999

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 P1479 2000 Ford F150 Description

Monitors the High Fan Control (HFC) primary circuit output from the Powertrain Control Module (PCM). The test fails if the HFC output commanded on (grounded), excessive current draw is detected on the HFC circuit or, with the HFC circuit commanded off, voltage is not detected on the HFC circuit (the PCM expects to detect VPWR voltage through the high speed FC relay coil to the HFC circuit).

OBDII Code P1479 2000 Ford F150 - High Fan Control Primary Circuit - AutoCodes.com — P1479 2000 Ford F150 Code - High Fan Control Primary Circuit

What does this mean?

What are the Possible Causes of the DTC P1479 2000 Ford F150?

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

How to Fix the DTC P1479 2000 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 P1479 2000 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.

Need more information about the P1479 2000 Ford F150 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 P1479 2000 Ford F150 Code

1. What are the common symptoms of OBDII code P1479 on a 2000 Ford F150?

- Common symptoms include the cooling fan running at high speed all the time, even when the engine is not overheating.

2. What could cause the OBDII code P1479 on a 2000 Ford F150?

- The main causes of this code are a faulty cooling fan control module, a malfunctioning cooling fan relay, or issues with the wiring or connectors in the cooling fan circuit.

3. How can I diagnose the high fan control primary circuit issue on my 2000 Ford F150?

- A thorough inspection of the cooling fan control module, relay, and wiring is recommended. Testing these components for proper functionality can help pinpoint the exact cause of the problem.

4. Can I continue driving my 2000 Ford F150 with the high fan control primary circuit issue?

- It is not advisable to drive the vehicle with this issue, as the cooling fan running at high speed constantly can lead to other problems and potential engine damage. It is best to address the issue promptly.

5. What is the typical repair process for fixing OBDII code P1479 on a 2000 Ford F150?

- The repair process usually involves replacing the faulty cooling fan control module, fixing any wiring or connector issues, or replacing the cooling fan relay if necessary.

6. Are there any DIY tips for troubleshooting OBDII code P1479 on a 2000 Ford F150?

- DIYers can start by checking the cooling fan fuse, inspecting the fan control module for visible damage, and testing the relay to determine if any of these components need replacement.

7. Will resetting the OBDII code P1479 on a 2000 Ford F150 make the issue go away?

- Simply resetting the code will not fix the underlying problem causing the high fan control primary circuit issue. It is important to diagnose and address the root cause of the code.

8. Can extreme weather conditions trigger OBDII code P1479 on a 2000 Ford F150?

- While extreme heat or cold can have an impact on the cooling system, the code is typically triggered by a malfunction in the cooling fan control circuit rather than weather conditions.

9. How much does it cost to repair OBDII code P1479 on a 2000 Ford F150?

- The cost of repairing this code can vary depending on the specific cause of the issue, but it may involve replacing components like the cooling fan control module, relay, or addressing wiring problems.

10. Is it necessary to visit a mechanic to fix OBDII code P1479 on a 2000 Ford F150?

- While some DIY enthusiasts may be able to troubleshoot and repair the issue themselves, seeking help from a qualified mechanic is recommended for an accurate diagnosis and proper repair of the high fan control primary circuit problem.