AutoCodes – Ford – P1479 2001 Ford F150

P1479 2001 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 2001 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 2,217

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 2001 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 2001 Ford F150 - High Fan Control Primary Circuit - AutoCodes.com — P1479 2001 Ford F150 Code - High Fan Control Primary Circuit

What does this mean?

What are the Possible Causes of the DTC P1479 2001 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 2001 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 2001 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 2001 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 2001 Ford F150 Code

1. What are the common symptoms of OBDII code P1479 in a 2001 Ford F150?

- Common symptoms include the radiator fan running at high speed continuously, even when the engine is cold, leading to potential overheating issues.

2. What does the OBDII code P1479 "High Fan Control Primary Circuit" indicate in a 2001 Ford F150?

- This code indicates a malfunction in the primary circuit controlling the radiator fan, causing it to operate at a high speed constantly.

3. What are some possible causes of OBDII code P1479 in a 2001 Ford F150?

- Possible causes include a faulty cooling fan relay, a malfunctioning engine coolant temperature sensor, or issues with the wiring or connectors in the fan control circuit.

4. How can I diagnose the OBDII code P1479 in my 2001 Ford F150?

- Diagnosing this code typically involves checking the cooling fan relay, inspecting the engine coolant temperature sensor, and testing the wiring and connectors for any faults.

5. How can I repair OBDII code P1479 in a 2001 Ford F150?

- Repairing this code may involve replacing the cooling fan relay, replacing the engine coolant temperature sensor, or repairing any damaged wiring or connectors in the fan control circuit.

6. Can driving with OBDII code P1479 in a 2001 Ford F150 cause further damage?

- Driving with this code may lead to overheating issues and potential damage to the engine if the cooling fan is not operating correctly. It is recommended to address the issue promptly.

7. Is it safe to continue driving my 2001 Ford F150 with OBDII code P1479?

- It is not recommended to drive the vehicle with this code active, as it can result in overheating and engine damage due to inadequate cooling from the radiator fan.

8. Can I reset the OBDII code P1479 in my 2001 Ford F150 on my own?

- While you can clear the code using an OBDII scanner, it is important to diagnose and repair the underlying issue causing the code to prevent it from reoccurring.

9. Will the check engine light turn off on its own after repairing OBDII code P1479 in a 2001 Ford F150?

- After repairing the issue causing the code, you may need to use an OBDII scanner to clear the code and reset the check engine light in order for it to turn off.

10. How much does it typically cost to repair OBDII code P1479 in a 2001 Ford F150?

- The cost of repairing this code can vary depending on the specific issue, but it may range from $100 to $300 for parts and labor, excluding any diagnostic fees.