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Engine-Codes – Ford – P0358 1997 Ford F150

P0358 1997 Ford F150 Code - Ignition Coil 'H' Primary/Secondary Circuit Malfunction

Quick Answer

The diagnostic trouble code P0358 for a 1997 Ford F150 indicates an issue with the Ignition Coil 'H' Primary/Secondary Circuit. Common causes include Faulty ignition coil, Damaged wiring or connectors in the ignition coil circuit, Issues with the Engine Control Module (ECM). 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 1997 Ford F150 indicates Ignition Coil 'H' Primary/Secondary Circuit Malfunction.
Common causes
Common causes include Faulty ignition coil, Damaged wiring or connectors in the ignition coil circuit, Issues with the Engine Control Module (ECM).
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 17, 2024
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Code P0358 1997 Ford F150 Description

The diagnostic trouble code P0358 for a 1997 Ford F150 indicates an issue with the Ignition Coil 'H' Primary/Secondary Circuit. This code specifically points to a malfunction in the primary or secondary circuit of the ignition coil associated with cylinder 'H'. The ignition coil is a crucial component of the ignition system that converts the low voltage from the battery into the high voltage needed to ignite the fuel-air mixture in the engine's cylinders. When this circuit malfunctions, it can lead to misfires, rough idling, poor fuel efficiency, and even engine stalling.

OBDII Code P0358 1997 Ford F150 - Ignition Coil 'H' Primary/Secondary Circuit Malfunction
P0358 1997 Ford F150 Code - Ignition Coil 'H' Primary/Secondary Circuit Malfunction

Common Causes of P0358 1997 Ford F150

  1. Faulty ignition coil
  2. Damaged wiring or connectors in the ignition coil circuit
  3. Issues with the Engine Control Module (ECM)
  4. Corrosion or poor electrical connections
  5. Environmental factors such as moisture or heat affecting the ignition system

Symptoms of P0358 1997 Ford F150

  1. Engine misfires
  2. Rough idling or vibrations
  3. Decreased fuel efficiency
  4. Engine stalling
  5. Illuminated check engine light

How to Fix P0358 1997 Ford F150

  1. Begin by diagnosing the specific cause of the issue using a diagnostic scanner to pinpoint the faulty component.
  2. Inspect the wiring and connectors associated with the ignition coil 'H' to check for any damage or corrosion.
  3. Test the ignition coil for proper functioning using a multimeter to measure resistance and ensure it is within specifications.
  4. Replace the faulty ignition coil if it fails the resistance test, ensuring to install a high-quality replacement part.
  5. Clear the diagnostic trouble codes from the vehicle's ECM using a scanner and test drive the vehicle to verify that the issue has been resolved.

Cost to Fix P0358 1997 Ford F150

The typical repair costs for addressing a P0358 code on a 1997 Ford F150 can range from $150 to $300, including parts and labor. However, it's important to note that specific diagnosis time and labor rates at auto repair shops can vary 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 advisable to check local rates for a more precise estimate before proceeding with the repair.

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 P0358 1997 Ford F150 Code

1. What are the common symptoms of OBDII code P0358 in a 1997 Ford F150?

- Common symptoms include engine misfires, rough idling, lack of power, and potentially stalling while driving.

2. What does the OBDII code P0358 indicate in a 1997 Ford F150?

- This code specifically points to a malfunction in the ignition coil 'H' primary/secondary circuit.

3. What are some possible causes of OBDII code P0358 in a 1997 Ford F150?

- Potential 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 source of OBDII code P0358 in my 1997 Ford F150?

- You can use a diagnostic scan tool to check for other related trouble codes, visually inspect the ignition coil and its connections, and perform electrical tests on the coil and circuit.

5. Can a DIY enthusiast repair OBDII code P0358 in a 1997 Ford F150?

- Yes, if you have the necessary tools and knowledge, replacing the faulty ignition coil or repairing wiring issues can be a DIY project.

6. What are some tips for repairing OBDII code P0358 in a 1997 Ford F150?

- Ensure the ignition system is properly grounded, use dielectric grease on electrical connections, and follow manufacturer guidelines for installing a new ignition coil.

7. Is it safe to continue driving with OBDII code P0358 present in a 1997 Ford F150?

- It is not recommended to drive with this code unresolved, as it can lead to further engine damage or potential safety hazards on the road.

8. How much does it typically cost to repair OBDII code P0358 in a 1997 Ford F150?

- The cost can vary depending on the root cause of the issue, but generally, replacing an ignition coil can range from $100 to $300 including parts and labor.

9. Will resetting the OBDII system clear the P0358 code in a 1997 Ford F150?

- Resetting the system may temporarily clear the code, but it will likely reappear if the underlying issue is not addressed and repaired.

10. Can weather conditions affect the occurrence of OBDII code P0358 in a 1997 Ford F150?

- Extreme weather conditions, such as high humidity or temperature fluctuations, can sometimes exacerbate ignition coil problems leading to the P0358 code.

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