AutoCodes – Ford – P0351 2001 Ford F150

P0351 2001 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 2001 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.

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Code Popularity 7,894

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jun 14, 2020

Description
Step-by-Step Diagnostic Guide
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P0351 2001 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 2001 Ford F150 - Ignition Coil A Primary/Secondary Circuit Malfunction - AutoCodes.com — P0351 2001 Ford F150 Code - Ignition Coil A Primary/Secondary Circuit Malfunction

What does this mean?

What are the Possible Causes of the DTC P0351 2001 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 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 does this mean?

Code Tech Notes

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).

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0351 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.

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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 2001 Ford F150 Code

1. What does OBDII code P0351 mean for a 2001 Ford F150?

The code P0351 indicates a primary/secondary circuit malfunction in the ignition coil A of a 2001 Ford F150.

2. What are common symptoms of a P0351 code in a 2001 Ford F150?

Common symptoms include engine misfires, rough idle, loss of power, and illuminated check engine light.

3. What can cause the ignition coil A primary/secondary circuit malfunction in a 2001 Ford F150?

Potential causes include a faulty ignition coil, damaged wiring or connectors, a problem with the powertrain control module (PCM), or issues with the spark plugs or spark plug wires.

4. How can I diagnose a P0351 code in my 2001 Ford F150?

Diagnosis typically involves inspecting the ignition coil, checking the wiring and connectors for damage, testing the spark plugs and wires, and scanning the PCM for additional fault codes.

5. Can a bad spark plug cause a P0351 code in a 2001 Ford F150?

Yes, a worn or faulty spark plug can lead to irregular ignition coil operation and trigger a P0351 code in a 2001 Ford F150.

6. How can I repair a P0351 code in my 2001 Ford F150?

Repair may involve replacing the faulty ignition coil, repairing damaged wiring or connectors, addressing any issues with the spark plugs or wires, or reprogramming the PCM.

7. Is it safe to continue driving with a P0351 code in a 2001 Ford F150?

It is not recommended to drive with a P0351 code as it can lead to further engine damage and poor vehicle performance. It's best to address the issue promptly.

8. Can I reset the check engine light after fixing a P0351 code in a 2001 Ford F150?

Yes, once the underlying issue causing the P0351 code is resolved, the check engine light can be reset using an OBDII scanner or disconnecting the car's battery for a few minutes.

9. How much does it typically cost to repair a P0351 code in a 2001 Ford F150?

The cost of repair can vary depending on the specific issue causing the code, but generally, it may range from $100 to $300 for parts and labor.

10. Will a P0351 code affect the fuel efficiency of a 2001 Ford F150?

Yes, a P0351 code can impact fuel efficiency due to engine misfires and improper combustion. Addressing the issue promptly can help restore optimal fuel economy.