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Engine-Codes – Ford – P0355 Ford

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

Quick Answer

The P0355 Ford trouble code indicates a problem with the Ignition Coil 'E' Primary/Secondary Circuit. Common causes include Faulty ignition coil, Wiring or connector issues in the ignition coil circuit, ECM issues. 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 Ford indicates Ignition Coil 'E' Primary/Secondary Circuit .
Common causes
Common causes include Faulty ignition coil, Wiring or connector issues in the ignition coil circuit, ECM issues.
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 09, 2024
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Code P0355 Ford Description

The P0355 Ford trouble code indicates a problem with the Ignition Coil 'E' Primary/Secondary Circuit. This code is specifically related to the ignition system of the vehicle, which is responsible for producing the spark that ignites the air-fuel mixture in the engine cylinders. The ignition coil is a crucial component of this system, as it generates the high voltage needed to create the spark.

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

Common Causes of P0355 Ford

  1. Faulty ignition coil
  2. Wiring or connector issues in the ignition coil circuit
  3. ECM issues
  4. Spark plug issues
  5. Ignition system ground faults

Symptoms of P0355 Ford

  1. Engine misfires
  2. Rough idle or stalling
  3. Decreased fuel efficiency
  4. Loss of power
  5. Illuminated check engine light

How to Fix P0355 Ford

  1. Diagnose the issue by using a scan tool to confirm the P0355 trouble code and inspecting the ignition coil 'E' and its circuitry.
  2. Test the ignition coil with a multimeter to check for proper resistance and continuity.
  3. Inspect the wiring and connectors associated with the ignition coil for any damage or corrosion.
  4. Replace the ignition coil if it is found to be faulty, making sure to install a high-quality replacement part.
  5. Clear the trouble code from the ECM memory and test drive the vehicle to ensure the issue has been resolved.

Cost to Fix P0355 Ford

The cost of repairing a P0355 Ford trouble code can vary depending on the specific cause of the issue and the labor rates in your area. Typically, replacing an ignition coil can cost between $100 and $250, including parts and labor. However, additional diagnostic time may be needed to pinpoint the exact cause of the problem, which can increase the overall repair cost. It's recommended to consult with a professional mechanic for a more accurate estimate based on your vehicle's make and model.

What does this mean?

Tech Notes for P0355 Ford

Ford Ignition Coil Primary Codes P0351-P0360 Diagnostic Walk through











User Submitted Video

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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Information for Specific Ford Models

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 Ford Code

1. What are common symptoms of OBDII code P0355 in a Ford related to the Ignition Coil 'E' Primary/Secondary Circuit?

- Common symptoms include engine misfires, rough idling, lack of power, and illuminated Check Engine Light.

2. What are possible causes of OBDII code P0355 in a Ford?

- Possible causes include a faulty ignition coil 'E', damaged wiring or connectors in the ignition coil circuit, or issues with the Engine Control Module (ECM).

3. How can I diagnose the source of OBDII code P0355 in a Ford?

- Use a scan tool to check for the specific code P0355. Then, perform a visual inspection of the ignition coil 'E', test the coil for proper resistance, and check the wiring and connectors for any damage.

4. Can a bad spark plug cause OBDII code P0355 in a Ford?

- Yes, a bad spark plug can potentially cause the ignition coil to malfunction, leading to OBDII code P0355 being triggered.

5. What are some repair tips for fixing OBDII code P0355 in a Ford?

- Start by replacing the faulty ignition coil 'E'. Ensure all wiring and connectors are in good condition. Clear the code and test drive the vehicle to confirm the issue is resolved.

6. Is it safe to drive with OBDII code P0355 present in a Ford?

- It is not recommended to drive with OBDII code P0355 present, as it can lead to further engine damage and poor vehicle performance.

7. How much does it typically cost to repair OBDII code P0355 in a Ford?

- The cost of repairing OBDII code P0355 can vary depending on the exact cause, but it typically ranges from $100 to $300 for parts and labor.

8. Can I reset OBDII code P0355 in a Ford without fixing the underlying issue?

- While you can clear the code using a scan tool, it will likely return if the root cause, such as a faulty ignition coil 'E', is not addressed.

9. Will OBDII code P0355 cause a Ford to fail an emissions test?

- Yes, OBDII code P0355 can cause a Ford to fail an emissions test due to increased emissions, engine misfires, and improper combustion.

10. How long does it take to repair OBDII code P0355 in a Ford?

- The repair time for OBDII code P0355 can vary depending on the skill level of the technician, but it typically takes around 1-2 hours to diagnose and replace the faulty ignition coil 'E'.

Discuss the causes and fixes for P0355 Ford OBDII Code

Submit a New Comment

  • Replaced spark plug and COP on #5... No change, code still "P0355". I'm going to check for an AC signal on #5 connector, if no signal, I'll check wiring back to PCM, then PCM itself.

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