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Engine-Codes – Ford – P0351 2009 Ford Fusion

P0351 2009 Ford Fusion Code - Ignition Coil 'A' Primary/Secondary Circuit

Quick Answer

The P0351 diagnostic trouble code (DTC) indicates a malfunction in the ignition coil 'A' primary/secondary circuit. Common causes include Faulty Ignition Coil: The ignition coil may be defective or damaged, leading to insufficient spark generation, Wiring Issues: Damaged or corroded wiring in the ignition coil circuit can disrupt the electrical flow, Faulty Spark Plug: Worn or fouled spark plugs can affect the ignition coil's performance. 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 2009 Ford Fusion indicates Ignition Coil 'A' Primary/Secondary Circuit .
Common causes
Common causes include Faulty Ignition Coil: The ignition coil may be defective or damaged, leading to insufficient spark generation, Wiring Issues: Damaged or corroded wiring in the ignition coil circuit can disrupt the electrical flow, Faulty Spark Plug: Worn or fouled spark plugs can affect the ignition coil's performance.
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 Oct 11, 2024
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Code P0351 2009 Ford Fusion Description

The P0351 diagnostic trouble code (DTC) indicates a malfunction in the ignition coil 'A' primary/secondary circuit. This code is specific to the ignition system of the 2009 Ford Fusion and typically points to an issue with the ignition coil that is responsible for generating the high voltage needed to ignite the air-fuel mixture in the engine's cylinders. The ignition coil converts the battery's low voltage to the high voltage required to create a spark at the spark plugs.

OBDII Code P0351 2009 Ford Fusion - Ignition Coil 'A' Primary/Secondary Circuit
P0351 2009 Ford Fusion Code - Ignition Coil 'A' Primary/Secondary Circuit

Common Causes of P0351 2009 Ford Fusion

  1. Faulty Ignition Coil: The ignition coil may be defective or damaged, leading to insufficient spark generation.
  2. Wiring Issues: Damaged or corroded wiring in the ignition coil circuit can disrupt the electrical flow.
  3. Faulty Spark Plug: Worn or fouled spark plugs can affect the ignition coil's performance.
  4. PCM Malfunction: A malfunctioning powertrain control module may not send the correct signals to the ignition coil.
  5. Poor Connections: Loose or corroded connectors in the ignition system can lead to intermittent issues.

Symptoms of P0351 2009 Ford Fusion

  1. Engine Misfires: The vehicle may experience misfires, leading to a rough running condition.
  2. Poor Acceleration: Drivers may notice a lack of power during acceleration due to insufficient spark.
  3. Check Engine Light: The illumination of the check engine light on the dashboard is a common symptom.
  4. Rough Idle: The engine may idle unevenly or shake when stopped.
  5. Difficulty Starting: The vehicle may have trouble starting or may not start at all.

How to Fix P0351 2009 Ford Fusion

  1. Visual Inspection: Begin with a thorough visual inspection of the ignition coil, wiring, and connectors for signs of damage or corrosion.
  2. Test the Ignition Coil: Use a multimeter to test the ignition coil's resistance and ensure it is within manufacturer specifications.
  3. Check Wiring and Connectors: Inspect the wiring harness and connectors for continuity and secure connections; repair or replace as necessary.
  4. Replace Faulty Components: If the ignition coil or spark plugs are found to be faulty, replace them with new, high-quality components.
  5. Clear Codes and Test Drive: After repairs, clear the DTCs using a scan tool and perform a test drive to ensure the issue has been resolved.

Cost to Fix P0351 2009 Ford Fusion

The typical repair costs for addressing a P0351 code can range from $150 to $500, depending on the specific repairs needed. This estimate includes parts such as ignition coils and spark plugs, as well as labor costs. Labor rates can vary significantly based on location, vehicle make and model, and engine type. Most auto repair shops charge between $80 and $150 per hour; however, rates in metropolitan areas or at dealerships may be higher, while independent shops often charge less. It is advisable to check local rates for a more precise estimate and to obtain quotes from multiple repair facilities to ensure competitive pricing.

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 2009 Ford Fusion Code

1. What does the OBDII code P0351 mean on a 2009 Ford Fusion?

P0351 indicates an issue with the Ignition Coil 'A' Primary/Secondary Circuit, which could prevent the coil from firing properly.

2. What are the symptoms of the P0351 code in a 2009 Ford Fusion?

Common symptoms include engine misfires, reduced power, rough idling, poor fuel efficiency, and the Check Engine Light turning on.

3. What causes the P0351 code to appear on a 2009 Ford Fusion?

Possible causes include a faulty ignition coil, damaged wiring or connectors in the circuit, a defective spark plug, or a malfunctioning powertrain control module (PCM).

4. Can I drive my 2009 Ford Fusion with a P0351 code?

While the car might still run, driving with this code can lead to engine damage, reduced performance, and potential safety issues. It’s best to address the problem promptly.

5. How do I diagnose the P0351 code on a 2009 Ford Fusion?

Start by inspecting the ignition coil, wiring, and connectors for damage. Use a multimeter to test the coil’s resistance and ensure proper connectivity. If needed, scan the PCM for additional related codes.

6. How do I fix the P0351 code on a 2009 Ford Fusion?

Repairs may include replacing the faulty ignition coil, repairing or replacing damaged wiring, installing new spark plugs, or reprogramming or replacing the PCM if necessary.

7. How much does it cost to fix the P0351 code on a 2009 Ford Fusion?

The cost depends on the repair, ranging from $50-$150 for a DIY ignition coil replacement to $300-$800 if professional diagnostics and PCM repairs are needed.

8. Can a bad spark plug cause the P0351 code in a 2009 Ford Fusion?

Yes, a defective or worn-out spark plug can affect the ignition coil’s performance and trigger the P0351 code.

9. How can I prevent the P0351 code from recurring in my 2009 Ford Fusion?

Regular maintenance, such as replacing spark plugs and ignition coils at recommended intervals and inspecting the ignition system wiring, can help prevent this code.

10. Will clearing the P0351 code fix the issue in my 2009 Ford Fusion?

Clearing the code may turn off the Check Engine Light temporarily, but it won’t resolve the underlying issue. Proper diagnosis and repair are necessary to fix the problem.

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