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Engine-Codes – Ford – P0358 1998 Ford F150

P0358 1998 Ford F150 Code - Ignition Coil 'H' Primary/Secondary Circuit Malfunction

Quick Answer

The Diagnostic Trouble Code (DTC) P0358 for a 1998 Ford F150 specifically indicates an issue with the Ignition Coil 'H' Primary/Secondary Circuit. Common causes include Faulty ignition coil 'H', Damaged or worn-out spark plugs, Wiring faults or loose connections in the ignition coil circuit. 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 1998 Ford F150 indicates Ignition Coil 'H' Primary/Secondary Circuit Malfunction.
Common causes
Common causes include Faulty ignition coil 'H', Damaged or worn-out spark plugs, Wiring faults or loose connections in the ignition coil circuit.
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 10, 2024
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Code P0358 1998 Ford F150 Description

The Diagnostic Trouble Code (DTC) P0358 for a 1998 Ford F150 specifically indicates an issue with the Ignition Coil 'H' Primary/Secondary Circuit. The ignition coil plays a crucial role in the vehicle's ignition system by converting the low voltage from the battery into the high voltage needed to ignite the fuel-air mixture in the engine's cylinders. In this case, the code signifies a malfunction in either the primary (low voltage) or secondary (high voltage) circuit of the ignition coil for cylinder 'H'.

OBDII Code P0358 1998 Ford F150 - Ignition Coil 'H' Primary/Secondary Circuit Malfunction
P0358 1998 Ford F150 Code - Ignition Coil 'H' Primary/Secondary Circuit Malfunction

Common Causes of P0358 1998 Ford F150

  1. Faulty ignition coil 'H'
  2. Damaged or worn-out spark plugs
  3. Wiring faults or loose connections in the ignition coil circuit
  4. Issues with the engine control module (ECM)
  5. Exposure to extreme temperatures or environmental conditions

Symptoms of P0358 1998 Ford F150

  1. Rough idling or engine misfires
  2. Decreased power and acceleration
  3. Poor fuel efficiency
  4. Increased emissions
  5. Illumination of the check engine light

How to Fix P0358 1998 Ford F150

  1. Begin by diagnosing the specific cause of the issue using a diagnostic scanner to pinpoint the malfunctioning component.
  2. Test the ignition coil 'H' for proper operation using a multimeter to check the resistance in both the primary and secondary circuits.
  3. Replace the faulty ignition coil if necessary, ensuring it is compatible with the vehicle's make and model.
  4. Inspect and replace any damaged or worn-out spark plugs that may have contributed to the ignition coil malfunction.
  5. Clear the DTC from the vehicle's computer using the diagnostic scanner and test drive the vehicle to verify that the issue has been resolved.

Cost to Fix P0358 1998 Ford F150

The cost of repairing an Ignition Coil 'H' Primary/Secondary Circuit Malfunction in a 1998 Ford F150 can vary depending on the specific components that need to be replaced and the labor rates in your area. On average, the cost of replacing an ignition coil can range from $100 to $300, while the cost of replacing spark plugs typically falls between $50 to $150. Additionally, factor in the cost of diagnostic testing and labor, which can add another $100 to $200 to the total repair bill. Overall, you can expect to pay anywhere from $250 to $600 for this repair, but it's advisable to obtain a detailed estimate from a trusted mechanic based on your vehicle's specific needs and location.

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 1998 Ford F150 Code

1. What are common symptoms of OBDII code P0358 in a 1998 Ford F150?

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

2. What does the OBDII code P0358 for a 1998 Ford F150 indicate?

- The code indicates a malfunction in the ignition coil 'H' primary/secondary circuit.

3. What are some possible causes of OBDII code P0358 in a 1998 Ford F150?

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

4. How can I diagnose the issue related to OBDII code P0358 in my 1998 Ford F150?

- You can diagnose the issue by performing a visual inspection of the ignition coil and its wiring, testing the ignition coil for resistance, and using a scan tool to check for related codes.

5. Can I still drive my 1998 Ford F150 with OBDII code P0358?

- It is not recommended to drive the vehicle with code P0358, as it can lead to further engine damage and potentially unsafe driving conditions.

6. How do I repair OBDII code P0358 in my 1998 Ford F150?

- Repair typically involves replacing the faulty ignition coil, repairing or replacing damaged wiring or connectors, and clearing the code with a scan tool.

7. Is it necessary to clear the code after repairing OBDII code P0358 in a 1998 Ford F150?

- Yes, it is important to clear the code with a scan tool after completing the repairs to reset the Check Engine light and ensure the issue has been resolved.

8. Can a DIY enthusiast fix OBDII code P0358 in a 1998 Ford F150?

- Depending on the level of expertise, a DIY enthusiast may be able to diagnose and replace the faulty ignition coil, but professional assistance is recommended for complex electrical issues.

9. How much does it cost to repair OBDII code P0358 in a 1998 Ford F150?

- The cost of repairs can vary based on the cause of the issue and labor rates, but expect to pay for a new ignition coil and potential wiring repairs.

10. What are the long-term effects of ignoring OBDII code P0358 in a 1998 Ford F150?

- Ignoring code P0358 can lead to persistent engine misfires, reduced fuel efficiency, and potential damage to the catalytic converter over time.

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