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Engine-Codes – Ford – P0357 1998 Ford F150

P0357 1998 Ford F150 Code - Ignition Coil 'G' Primary/Secondary Circuit Malfunction

Quick Answer

The diagnostic trouble code P0357 for a 1998 Ford F150 indicates an issue with the Ignition Coil 'G' Primary/Secondary Circuit. Common causes include Faulty ignition coil 'G', Damaged or corroded wiring in the ignition coil circuit, Defective 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
P0357 1998 Ford F150 indicates Ignition Coil 'G' Primary/Secondary Circuit Malfunction.
Common causes
Common causes include Faulty ignition coil 'G', Damaged or corroded wiring in the ignition coil circuit, Defective 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 P0357 1998 Ford F150 Description

The diagnostic trouble code P0357 for a 1998 Ford F150 indicates an issue with the Ignition Coil 'G' Primary/Secondary Circuit. The ignition coil is a crucial component of the vehicle's ignition system, responsible for converting low voltage from the battery into the high voltage needed to ignite the fuel-air mixture in the engine cylinders. The primary circuit controls the power supply to the ignition coil, while the secondary circuit is responsible for delivering the high voltage spark to the spark plugs.

OBDII Code P0357 1998 Ford F150 - Ignition Coil 'G' Primary/Secondary Circuit Malfunction
P0357 1998 Ford F150 Code - Ignition Coil 'G' Primary/Secondary Circuit Malfunction

Common Causes of P0357 1998 Ford F150

  1. Faulty ignition coil 'G'
  2. Damaged or corroded wiring in the ignition coil circuit
  3. Defective ECM
  4. Issues with spark plugs or spark plug wires
  5. Poor electrical connection in the ignition system

Symptoms of P0357 1998 Ford F150

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

How to Fix P0357 1998 Ford F150

  1. Begin by diagnosing the specific cause of the issue using a scan tool to pinpoint the exact problem within the ignition coil circuit.
  2. Inspect the wiring and connections related to the ignition coil 'G' for any damage or corrosion. Repair or replace as necessary.
  3. Test the ignition coil 'G' using a multimeter to check for proper resistance and continuity. Replace the ignition coil if it fails the test.
  4. Check the spark plugs and spark plug wires for any signs of wear or damage. Replace if needed.
  5. Clear the diagnostic trouble codes from the ECM and test drive the vehicle to ensure the issue has been resolved.

Cost to Fix P0357 1998 Ford F150

The typical repair costs for addressing the Ignition Coil 'G' Primary/Secondary Circuit Malfunction on a 1998 Ford F150 can range from $150 to $400. This estimate includes the cost of a new ignition coil, any necessary wiring repairs, and labor charges. However, it is important to note that the 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. It is recommended to check with local auto repair shops for a more accurate estimate.

What does this mean?

Tech Notes for P0357 1998 Ford F150

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).

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 P0357 1998 Ford F150 Code

1. What are the common symptoms of OBDII code P0357 in a 1998 Ford F150?

- Common symptoms include engine misfires, rough idling, poor acceleration, and difficulty starting the vehicle.

2. What does the OBDII code P0357 indicate in a 1998 Ford F150?

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

3. What are the possible causes of OBDII code P0357 in a 1998 Ford F150?

- Possible causes include a faulty ignition coil 'G', wiring issues in the ignition coil circuit, or a problem with the engine control module (ECM).

4. How can I diagnose the ignition coil 'G' primary/secondary circuit malfunction in my 1998 Ford F150?

- You can use a scan tool to read the OBDII code, perform a visual inspection of the ignition coil and its wiring, and conduct a continuity test to check for any wiring faults.

5. Can I still drive my 1998 Ford F150 with OBDII code P0357?

- It is not recommended to drive your vehicle with this code as it can lead to further engine damage and safety issues. It's best to address the issue promptly.

6. How can I repair OBDII code P0357 in my 1998 Ford F150?

- Repair options include replacing the faulty ignition coil 'G', repairing any damaged wiring, or reprogramming the ECM if necessary.

7. Is it possible to reset the OBDII code P0357 in a 1998 Ford F150 without fixing the issue?

- While you can clear the code with a scan tool, it is not recommended as the underlying issue causing the code will still persist.

8. Can a DIY enthusiast fix OBDII code P0357 in a 1998 Ford F150?

- Depending on your experience and tools, you may be able to replace the ignition coil 'G' yourself. However, diagnosing and repairing wiring issues or ECM problems may require professional assistance.

9. How much does it cost to fix OBDII code P0357 in a 1998 Ford F150?

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

10. How can I prevent OBDII code P0357 from recurring in my 1998 Ford F150?

- Regular maintenance, such as checking and replacing ignition coils as needed, inspecting wiring for damage, and keeping the ECM software up to date, can help prevent this code from recurring.

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