AutoCodes – Ford – P1479 1998 Ford F150

P1479 1998 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 1998 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 2,158

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 1998 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 1998 Ford F150 - High Fan Control Primary Circuit - AutoCodes.com — P1479 1998 Ford F150 Code - High Fan Control Primary Circuit

What does this mean?

What are the Possible Causes of the DTC P1479 1998 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 1998 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 1998 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 1998 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 1998 Ford F150 Code

1. What are the common symptoms of OBDII code P1479 in a 1998 Ford F150?

- Common symptoms include the radiator fan running at high speed constantly, poor engine performance, and potential overheating issues.

2. What could cause the OBDII code P1479 in a 1998 Ford F150?

- The code P1479 may be triggered by a faulty high fan control primary circuit, a malfunctioning cooling fan relay, or a problem with the cooling fan motor itself.

3. How can I diagnose the high fan control primary circuit issue in my 1998 Ford F150?

- To diagnose the issue, you can perform a visual inspection of the cooling fan components, check the cooling fan fuse and relay, test the cooling fan motor, and inspect the wiring for any damage or corrosion.

4. What are some repair tips for fixing OBDII code P1479 in a 1998 Ford F150?

- Repair tips include replacing a faulty cooling fan relay, repairing or replacing damaged wiring, testing and replacing the cooling fan motor if needed, and ensuring all connections are secure.

5. Can driving with OBDII code P1479 in a 1998 Ford F150 cause further damage?

- Driving with code P1479 can potentially lead to engine overheating, decreased fuel efficiency, and other engine issues if not addressed promptly.

6. Is it safe to continue driving my 1998 Ford F150 with the high fan control primary circuit issue?

- It is not recommended to drive the vehicle with code P1479, as it can lead to overheating and potential engine damage. It's best to address the issue as soon as possible.

7. How much does it typically cost to repair OBDII code P1479 in a 1998 Ford F150?

- The cost of repair can vary depending on the exact cause of the issue, but it may range from $100 to $300 for parts and labor.

8. Can I reset the OBDII code P1479 in my 1998 Ford F150 by disconnecting the battery?

- While disconnecting the battery may clear the code temporarily, it is not a recommended method for addressing the underlying issue. It's best to diagnose and repair the root cause of the problem.

9. Will replacing the cooling fan fix OBDII code P1479 in a 1998 Ford F150?

- Replacing the cooling fan may resolve the issue if the problem lies with the fan itself. However, it's important to diagnose the entire cooling system to ensure all components are functioning properly.

10. How long does it take to repair OBDII code P1479 in a 1998 Ford F150?

- The repair time can vary depending on the exact cause of the issue and the availability of parts. In general, it may take a few hours to a day to diagnose and repair the high fan control primary circuit problem.