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Engine-Codes – Ford – P0355 2007 Ford Fusion

P0355 2007 Ford Fusion Code - Ignition Coil 'E' Primary/Secondary Circuit

Quick Answer

The diagnostic trouble code P0355 for a 2007 Ford Fusion indicates a problem with the Ignition Coil 'E' Primary/Secondary Circuit. Common causes include Faulty ignition coil 'E', Wiring issues in the primary or secondary circuit, Loose or corroded electrical connections. 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
P0355 2007 Ford Fusion indicates Ignition Coil 'E' Primary/Secondary Circuit .
Common causes
Common causes include Faulty ignition coil 'E', Wiring issues in the primary or secondary circuit, Loose or corroded electrical connections.
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 15, 2024
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Code P0355 2007 Ford Fusion Description

The diagnostic trouble code P0355 for a 2007 Ford Fusion indicates a problem with the Ignition Coil 'E' 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 fuel-air mixture in the engine cylinders. The primary circuit is responsible for delivering power to the ignition coil, while the secondary circuit is responsible for delivering the high voltage spark to the spark plugs.

OBDII Code P0355 2007 Ford Fusion - Ignition Coil 'E' Primary/Secondary Circuit
P0355 2007 Ford Fusion Code - Ignition Coil 'E' Primary/Secondary Circuit

Common Causes of P0355 2007 Ford Fusion

  1. Faulty ignition coil 'E'
  2. Wiring issues in the primary or secondary circuit
  3. Loose or corroded electrical connections
  4. ECM software issues
  5. Engine overheating causing damage to the ignition coil

Symptoms of P0355 2007 Ford Fusion

  1. Engine misfires
  2. Rough idling
  3. Decreased fuel efficiency
  4. Difficulty starting the engine
  5. Illumination of the Check Engine Light

How to Fix P0355 2007 Ford Fusion

  1. Diagnose the specific cause of the issue using a scan tool to pinpoint the exact problem within the ignition coil 'E' circuit.
  2. Inspect the ignition coil 'E' for any signs of physical damage or internal faults. Replace the ignition coil if necessary.
  3. Check the wiring harness and connectors for any damage, corrosion, or loose connections. Repair or replace as needed.
  4. Clear the diagnostic trouble codes from the ECM memory and test drive the vehicle to ensure the issue has been resolved.
  5. If the problem persists, further diagnostic testing may be required to identify any underlying issues with the ECM or other related components.

Cost to Fix P0355 2007 Ford Fusion

The typical repair costs for addressing the Ignition Coil 'E' Primary/Secondary Circuit issue in a 2007 Ford Fusion can range from $150 to $300 for parts and labor. However, it's important to note that specific diagnosis time and labor rates at auto repair shops can vary significantly based on factors such as location, vehicle make and model, and engine type. Rates in metropolitan areas or at dealerships may be higher, while independent shops often charge less. It's recommended to check with local auto repair shops for a more accurate estimate.

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 P0355 2007 Ford Fusion Code

1. What does OBDII code P0355 on a 2007 Ford Fusion mean?

The code P0355 indicates a problem with the ignition coil 'E' primary/secondary circuit in your vehicle.

2. What are common symptoms of a P0355 code in a 2007 Ford Fusion?

Common symptoms of a P0355 code may include engine misfires, rough idling, loss of power, and illuminated check engine light.

3. What are possible causes of a P0355 code in a 2007 Ford Fusion?

Possible causes of a P0355 code include a faulty ignition coil, damaged wiring or connectors in the ignition coil circuit, or issues with the PCM (powertrain control module).

4. How can I diagnose a P0355 code on my 2007 Ford Fusion?

Diagnosing a P0355 code typically involves inspecting the ignition coil 'E', checking for damaged wiring or connectors, and testing the circuit for proper operation using a multimeter.

5. Can I still drive my 2007 Ford Fusion with a P0355 code?

It is not recommended to drive your vehicle with a P0355 code, as it can lead to further damage to the ignition system and potentially result in engine performance issues.

6. How can I repair a P0355 code on my 2007 Ford Fusion?

Repairing a P0355 code may involve replacing the faulty ignition coil 'E', repairing damaged wiring or connectors, or reprogramming the PCM, depending on the root cause of the issue.

7. Are there any tips for preventing a P0355 code in my 2007 Ford Fusion?

To prevent a P0355 code, it is recommended to perform regular maintenance on your vehicle, including checking and replacing ignition components as needed and addressing any electrical issues promptly.

8. Does a P0355 code affect fuel efficiency in a 2007 Ford Fusion?

Yes, a P0355 code can affect fuel efficiency in your vehicle due to engine misfires and inefficient combustion, leading to decreased miles per gallon.

9. Can a DIY enthusiast fix a P0355 code in a 2007 Ford Fusion?

Depending on the individual's mechanical skills and experience, a DIY enthusiast may be able to diagnose and repair a P0355 code by following proper diagnostic procedures and using the right tools.

10. Is it necessary to reset the PCM after fixing a P0355 code on a 2007 Ford Fusion?

After fixing a P0355 code, it is recommended to reset the PCM to clear the error code and allow the vehicle's onboard computer to relearn the new components and ensure proper operation.

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