AutoCodes – Ford – P0358 2003 Ford F150

P0358 2003 Ford F150 Code - Ignition Coil 'H' 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 8, Ignition Coil 8 harness is open or shorted, Ignition Coil 8 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: P0358 2003 Ford F150 indicates Ignition Coil 'H' Primary/Secondary Circuit Malfunction.
Common causes: Common causes include Faulty Ignition Coil 8, Ignition Coil 8 harness is open or shorted, Ignition Coil 8 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 7,407

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
Cost to Diagnose
FAQs
Comments
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Code P0358 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 P0358 2003 Ford F150 - Ignition Coil 'H' Primary/Secondary Circuit Malfunction - AutoCodes.com — P0358 2003 Ford F150 Code - Ignition Coil 'H' Primary/Secondary Circuit Malfunction

What does this mean?

What are the Possible Causes of the DTC P0358 2003 Ford F150?

Faulty Ignition Coil 8
Ignition Coil 8 harness is open or shorted
Ignition Coil 8 circuit poor electrical connection
Faulty Engine Control Module (ECM)

How to Fix the DTC P0358 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 is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0358 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 P0358 2003 Ford F150 code?

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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 P0358 2003 Ford F150 Code

1. What are the common symptoms of OBDII code P0358 in a 2003 Ford F150?

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

2. What does the OBDII code P0358 indicate for a 2003 Ford F150?

- The code P0358 indicates an Ignition Coil 'H' Primary/Secondary Circuit Malfunction in the vehicle.

3. What are the possible causes of OBDII code P0358 in a 2003 Ford F150?

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

4. How can I diagnose the Ignition Coil 'H' Primary/Secondary Circuit Malfunction in a 2003 Ford F150?

- Diagnosis involves inspecting the ignition coil, checking the wiring and connectors for damage, and using a scan tool to monitor the coil's operation.

5. Can I still drive my 2003 Ford F150 with OBDII code P0358?

- It is not recommended to drive the vehicle with code P0358 as it can lead to further damage and poor engine performance.

6. How can I repair OBDII code P0358 in my 2003 Ford F150?

- Repair options include replacing the faulty ignition coil, repairing damaged wiring or connectors, and clearing the trouble codes with a scan tool.

7. Is it necessary to replace all ignition coils if one is found faulty with code P0358 in a 2003 Ford F150?

- It is recommended to replace the specific faulty ignition coil identified by the code P0358, but inspecting other coils for potential issues is advisable.

8. Can a DIY enthusiast fix OBDII code P0358 in a 2003 Ford F150?

- While some repairs related to code P0358 can be done by DIY enthusiasts, it's recommended to seek professional help, especially for complex diagnostics and repairs.

9. How much does it cost to repair OBDII code P0358 in a 2003 Ford F150?

- The cost of repairing code P0358 can vary depending on the specific issue, but it may involve expenses for parts, labor, and diagnostic services.

10. What are the long-term consequences of ignoring OBDII code P0358 in a 2003 Ford F150?

- Ignoring code P0358 can lead to persistent engine misfires, reduced fuel efficiency, potential damage to the catalytic converter, and overall poor vehicle performance.