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Engine-Codes – Ford – P0351 1998 Ford F150

P0351 1998 Ford F150 Code - Ignition Coil A Primary/Secondary Circuit Malfunction

Quick Answer

The diagnostic trouble code P0351 in a 1998 Ford F150 indicates an issue with the ignition coil A primary/secondary circuit. Common causes include Faulty ignition coil A, Damaged wiring or connectors in the ignition coil circuit, Issues with the spark plug boot. 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
P0351 1998 Ford F150 indicates Ignition Coil A Primary/Secondary Circuit Malfunction .
Common causes
Common causes include Faulty ignition coil A, Damaged wiring or connectors in the ignition coil circuit, Issues with the spark plug boot.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 08, 2024
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Code P0351 1998 Ford F150 Description

The diagnostic trouble code P0351 in a 1998 Ford F150 indicates an issue with the ignition coil A primary/secondary circuit. The ignition coil is a crucial component of the vehicle's ignition system, responsible for converting the low voltage from the battery into the high voltage needed to ignite the air-fuel mixture in the engine cylinders. When the PCM (Powertrain Control Module) detects a malfunction in the primary or secondary circuit of ignition coil A, it triggers the P0351 code.

OBDII Code P0351 1998 Ford F150 - Ignition Coil A Primary/Secondary Circuit Malfunction
P0351 1998 Ford F150 Code - Ignition Coil A Primary/Secondary Circuit Malfunction

Common Causes of P0351 1998 Ford F150

  1. Faulty ignition coil A
  2. Damaged wiring or connectors in the ignition coil circuit
  3. Issues with the spark plug boot
  4. PCM malfunction
  5. Environmental factors such as moisture or corrosion

Symptoms of P0351 1998 Ford F150

  1. Engine misfires
  2. Rough idling or vibrations
  3. Decreased fuel efficiency
  4. Difficulty starting the engine
  5. Engine stalling

How to Fix P0351 1998 Ford F150

  1. Conduct a thorough diagnostic scan to confirm the P0351 code and pinpoint the exact cause of the issue.
  2. Inspect the wiring and connectors in the ignition coil A circuit for any damage or corrosion. Repair or replace as needed.
  3. Test the ignition coil A for proper functionality using a multimeter. Replace if faulty.
  4. Check the spark plug boot for damage or wear. Replace if necessary.
  5. Clear the diagnostic trouble codes from the PCM and test drive the vehicle to ensure the issue has been resolved.

Cost to Fix P0351 1998 Ford F150

The typical repair costs for resolving a P0351 code in a 1998 Ford F150 can range from $150 to $400, including parts and labor. However, specific diagnosis time and labor rates at auto repair shops can vary based on factors such as location, vehicle make and model, and engine type. It is recommended to check with local auto repair shops for a more accurate estimate tailored to your specific situation.

What does this mean?

Tech Notes for P0351 1998 Ford F150

Each ignition primary circuit is continuously monitored. The test fails when the PCM does not receive a valid IDM pulse signal from the ignition module (integrated in PCM).

When is the Code Detected?

Each ignition circuit is continuously monitored by the Engine Control Module (ECM). The test fails when the ECM does not receive a valid pulse signal from the ignition coil.

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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 P0351 1998 Ford F150 Code

1. What are the common symptoms of OBDII code P0351 in a 1998 Ford F150?

The common symptoms of code P0351 include engine misfires, rough idling, loss of power, and illuminated check engine light.

2. What does OBDII code P0351 in a 1998 Ford F150 indicate?

Code P0351 indicates a primary or secondary circuit malfunction in the ignition coil A of the vehicle.

3. What are the possible causes of OBDII code P0351 in a 1998 Ford F150?

Possible causes of code P0351 include a faulty ignition coil, damaged wiring or connectors in the ignition coil circuit, or a problem with the engine control module (ECM).

4. How can I diagnose a P0351 code in my 1998 Ford F150?

Diagnosing a P0351 code involves checking the ignition coil A for signs of damage, inspecting the wiring and connectors for any wear or corrosion, and using a scan tool to monitor the ignition coil circuit.

5. Can I still drive my 1998 Ford F150 with OBDII code P0351?

It is not recommended to drive your vehicle with code P0351 as it can lead to more serious issues like catalytic converter damage. It's best to address the issue promptly.

6. How can I repair OBDII code P0351 in my 1998 Ford F150?

To repair code P0351, you may need to replace the ignition coil A, repair any damaged wiring or connectors, or reset the ECM after addressing the underlying issue.

7. Will resetting the check engine light fix OBDII code P0351 in my 1998 Ford F150?

Resetting the check engine light may temporarily clear the code, but it will likely return if the root cause of the issue, such as a faulty ignition coil, is not addressed.

8. How much does it typically cost to repair OBDII code P0351 in a 1998 Ford F150?

The cost of repairing code P0351 can vary depending on the cause of the issue, but it may range from $100 to $300 for parts and labor.

9. Can a DIY enthusiast fix OBDII code P0351 in a 1998 Ford F150?

If you have experience working on automotive electrical systems, you may be able to diagnose and repair code P0351 yourself by following a repair manual or online guides.

10. Is it common for the ignition coil to fail in a 1998 Ford F150 triggering code P0351?

Yes, ignition coil failures are relatively common in vehicles, including the 1998 Ford F150, and can often trigger code P0351 due to issues with the primary or secondary circuit.

Discuss the causes and fixes for P0351 1998 Ford F150 OBDII Code

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  • regarding a 98 f150 with the 4.6l codees p0351/p0352, I replaced both ignition coils,new plugs and wires, the weird part is that when the truck starts rough idling or misfiring it resolves by turning off the truck and starting it back on so something must be reseting... pcm?

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