AutoCodes – Ford – P0355 2003 Ford F150

P0355 2003 Ford F150 Code - Ignition Coil 'E' Primary/Secondary Circuit

Quick Answer

The ignition system on the vehicle uses individual ignition coils for each cylinder. Common causes include Faulty Ignition Coil 5, Ignition Coil 5 harness is open or shorted, Ignition Coil 5 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: P0355 2003 Ford F150 indicates Ignition Coil 'E' Primary/Secondary Circuit .
Common causes: Common causes include Faulty Ignition Coil 5, Ignition Coil 5 harness is open or shorted, Ignition Coil 5 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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 7,523

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
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code P0355 2003 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 P0355 2003 Ford F150 - Ignition Coil 'E' Primary/Secondary Circuit - AutoCodes.com — P0355 2003 Ford F150 Code - Ignition Coil 'E' Primary/Secondary Circuit

What does this mean?

What are the Possible Causes of the DTC P0355 2003 Ford F150?

Faulty Ignition Coil 5
Ignition Coil 5 harness is open or shorted
Ignition Coil 5 circuit poor electrical connection
Faulty Engine Control Module (ECM)

How to Fix the DTC P0355 2003 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 P0355 2003 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 P0355 2003 Ford F150 code?

Need more information on how to fix the P0355 2003 Ford F150 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0355 2003 Ford F150 code diagnosed by a professional: Find a repair shop in your area

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 2003 Ford F150 Code

1. What are the common symptoms of OBDII code P0355 on a 2003 Ford F150?

The common symptoms of P0355 include engine misfires, rough idling, loss of power, and illuminated Check Engine Light.

2. What does the OBDII code P0355 for a 2003 Ford F150 indicate?

OBDII code P0355 specifically refers to an issue with the ignition coil 'E' primary/secondary circuit.

3. What are the possible causes of OBDII code P0355 on a 2003 Ford F150?

Common causes of P0355 include a faulty ignition coil 'E', damaged wiring or connectors in the ignition coil circuit, or issues with the Engine Control Module (ECM).

4. How can I diagnose the source of OBDII code P0355 on my 2003 Ford F150?

Diagnosing P0355 involves inspecting the ignition coil 'E', checking the wiring and connectors for damage, and using a scan tool to analyze the signals from the ECM.

5. Can a faulty spark plug cause OBDII code P0355 on a 2003 Ford F150?

Yes, a faulty spark plug can potentially cause misfires that trigger code P0355. It's recommended to inspect and replace spark plugs if needed when addressing this code.

6. Is it safe to drive my 2003 Ford F150 with OBDII code P0355 active?

Continuing to drive with code P0355 may lead to further engine damage or performance issues. It's advisable to address the underlying issue promptly to prevent any potential issues.

7. How do I repair OBDII code P0355 on a 2003 Ford F150?

Repairing P0355 involves replacing the faulty ignition coil 'E', repairing any damaged wiring or connectors, and clearing the code using a diagnostic tool.

8. Can a DIY enthusiast fix OBDII code P0355 on a 2003 Ford F150?

While some may have the skills to address P0355 themselves, it's recommended to consult a professional mechanic for accurate diagnosis and repair to ensure the issue is resolved correctly.

9. What is the typical cost to repair OBDII code P0355 on a 2003 Ford F150?

The cost to repair P0355 can vary depending on the cause and the mechanic's labor rates. Generally, replacing an ignition coil or repairing wiring can cost between $100 to $300.

10. How frequently does OBDII code P0355 occur on a 2003 Ford F150?

The occurrence of P0355 can vary based on the vehicle's condition and maintenance history. It's not uncommon for ignition coil issues to trigger this code in older vehicles like the 2003 Ford F150.