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Engine-Codes – Ford – P0357 1997 Ford F150

P0357 1997 Ford F150 Code - Ignition Coil 'G' Primary/Secondary Circuit Malfunction

Quick Answer

The diagnostic trouble code P0357 for a 1997 Ford F150 indicates an issue with the Ignition Coil 'G' Primary/Secondary Circuit. Common causes include Faulty ignition coil 'G', Damaged wiring or connectors in the ignition coil circuit, Defective spark plug in cylinder 'G'. 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 1997 Ford F150 indicates Ignition Coil 'G' Primary/Secondary Circuit Malfunction.
Common causes
Common causes include Faulty ignition coil 'G', Damaged wiring or connectors in the ignition coil circuit, Defective spark plug in cylinder 'G'.
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 1997 Ford F150 Description

The diagnostic trouble code P0357 for a 1997 Ford F150 indicates an issue with the Ignition Coil 'G' Primary/Secondary Circuit. The ignition coil is a crucial component of the ignition system responsible for converting the low voltage from the battery into the high voltage needed to ignite the fuel-air mixture in the engine cylinders. The primary circuit is responsible for delivering the low voltage to the coil, while the secondary circuit amplifies this voltage to create the spark needed for combustion.

OBDII Code P0357 1997 Ford F150 - Ignition Coil 'G' Primary/Secondary Circuit Malfunction
P0357 1997 Ford F150 Code - Ignition Coil 'G' Primary/Secondary Circuit Malfunction

Common Causes of P0357 1997 Ford F150

  1. Faulty ignition coil 'G'
  2. Damaged wiring or connectors in the ignition coil circuit
  3. Defective spark plug in cylinder 'G'
  4. Issues with the Engine Control Module (ECM)
  5. Environmental factors such as moisture or corrosion affecting the ignition system

Symptoms of P0357 1997 Ford F150

  1. Engine misfires
  2. Rough idling
  3. Decreased fuel efficiency
  4. Difficulty starting the engine
  5. Illumination of the Check Engine Light

How to Fix P0357 1997 Ford F150

  1. Begin by diagnosing the specific cause of the issue using a diagnostic scanner to pinpoint the exact problem within the ignition coil 'G' circuit.
  2. Inspect the wiring and connectors related to the ignition coil 'G' for any signs of damage or corrosion. Replace any faulty components.
  3. Test the ignition coil 'G' using a multimeter to determine if it is functioning correctly. Replace the ignition coil if necessary.
  4. Check and replace the spark plug in cylinder 'G' if it is found to be faulty or worn out.
  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 1997 Ford F150

The typical repair costs for addressing an ignition coil 'G' primary/secondary circuit malfunction in a 1997 Ford F150 can range from $150 to $400, including parts and labor. 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. Rates in metropolitan areas or at dealerships may be higher, while independent shops often charge less. It is advisable to check local rates for a more precise estimate.

What does this mean?

Tech Notes for P0357 1997 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 1997 Ford F150 Code

1. What are the common symptoms of OBDII code P0357 on a 1997 Ford F150?

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

2. What are the possible causes of OBDII code P0357 on a 1997 Ford F150?

- The code P0357 indicates an issue with the ignition coil 'G' primary/secondary circuit, which can be caused by a faulty ignition coil, wiring issues, or a damaged spark plug.

3. How can I diagnose the ignition coil 'G' primary/secondary circuit malfunction on my 1997 Ford F150?

- Diagnose by checking the ignition coil 'G' for physical damage, testing the coil's resistance, inspecting the wiring for any breaks or shorts, and verifying the spark plug's condition.

4. Can a bad ignition coil cause OBDII code P0357 on a 1997 Ford F150?

- Yes, a faulty ignition coil can trigger code P0357 as it disrupts the primary/secondary circuit's operation, leading to ignition system malfunctions.

5. How can I repair OBDII code P0357 on my 1997 Ford F150?

- Repair involves replacing the faulty ignition coil 'G', repairing or replacing damaged wiring, and ensuring proper connection of the spark plug.

6. Are there any DIY tips for fixing OBDII code P0357 on a 1997 Ford F150?

- DIY tips include using a multimeter to test the ignition coil's resistance, carefully inspecting the wiring harness for any visible damage, and replacing the spark plug if necessary.

7. Can driving with OBDII code P0357 on a 1997 Ford F150 cause further damage?

- Continuing to drive with code P0357 can potentially lead to more severe engine issues, reduced fuel efficiency, and may eventually cause permanent damage to the ignition system.

8. How much does it typically cost to repair OBDII code P0357 on a 1997 Ford F150?

- The cost of repair can vary depending on the specific cause of the issue, but typically, replacing an ignition coil 'G' can cost between $100 to $200 including labor.

9. Is it safe to clear the OBDII code P0357 on a 1997 Ford F150 without fixing the underlying issue?

- Clearing the code without addressing the root cause can temporarily turn off the Check Engine Light, but the issue will persist, potentially leading to more significant problems in the future.

10. Can a mechanic easily fix OBDII code P0357 on a 1997 Ford F150?

- A qualified mechanic with experience in automotive diagnostics can efficiently diagnose and repair code P0357 by following the manufacturer's recommended procedures and using the necessary tools and equipment.

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