AutoCodes – Ford – P0351 1998 Ford F150

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

Quick Answer

The ignition system on the vehicle uses individual ignition coils for each cylinder. Common causes include Faulty Ignition Coil 1, Ignition Coil 1 harness is open or shorted, Ignition Coil 1 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
P0351 1998 Ford F150 indicates Ignition Coil A Primary/Secondary Circuit Malfunction .
Common causes
Common causes include Faulty Ignition Coil 1, Ignition Coil 1 harness is open or shorted, Ignition Coil 1 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.
AI answers can be wrong. Verify repairs with testing. Open full chat
Code Popularity 6,556
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Jun 14, 2020
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Code P0351 1998 Ford F150 Description

The ignition system on the vehicle uses individual ignition coils for each cylinder. The Engine Control Module (ECM) controls each ignition coil operation. The ECM sends a ON/OFF signal to energize the ignition coil to create a spark at the spark plug when a spark is required at the cylinder.
OBDII Code P0351 1998 Ford F150 - Ignition Coil A Primary/Secondary Circuit Malfunction  - AutoCodes.com
P0351 1998 Ford F150 Code - Ignition Coil A Primary/Secondary Circuit Malfunction

What are the Possible Causes of the DTC P0351 1998 Ford F150?

  • Faulty Ignition Coil 1
  • Ignition Coil 1 harness is open or shorted
  • Ignition Coil 1 circuit poor electrical connection
  • Faulty Engine Control Module (ECM)

How to Fix the DTC P0351 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.

Code Tech Notes

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0351 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 P0351 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 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

  • 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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