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Engine-Codes – Hyundai – P0351 Hyundai

P0351 Hyundai Code - Ignition Coil 'A' Primary/Secondary Circuit

Quick Answer

The P0351 code for Hyundai vehicles indicates a problem with the ignition coil 'A' 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
P0351 Hyundai indicates Ignition Coil 'A' Primary/Secondary Circuit.
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 07, 2024
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Code P0351 Hyundai Description

The P0351 code for Hyundai vehicles indicates a problem with the ignition coil 'A' primary/secondary circuit. The ignition coil is a vital component of the ignition system, responsible for converting the low voltage from the battery into the high voltage needed to ignite the air-fuel mixture in the engine's cylinders. The primary circuit is responsible for delivering power to the coil, while the secondary circuit is responsible for transmitting the high voltage spark to the spark plugs.

OBDII Code P0351 Hyundai - Ignition Coil 'A' Primary/Secondary Circuit
P0351 Hyundai Code - Ignition Coil 'A' Primary/Secondary Circuit

Common Causes of P0351 Hyundai

  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 connection in the circuit
  5. Excessive heat or vibration affecting the ignition coil

Symptoms of P0351 Hyundai

  1. Engine misfires
  2. Rough idling or stalling
  3. Decreased fuel efficiency
  4. Loss of power
  5. Illumination of the check engine light

How to Fix P0351 Hyundai

  1. Begin by diagnosing the specific cause of the issue using an OBD-II scanner to retrieve the trouble codes and performing a visual inspection of the ignition coil, wiring, and connectors.
  2. Test the ignition coil using a multimeter to check for proper resistance values and ensure that it is functioning correctly.
  3. Inspect the wiring and connectors for any damage, corrosion, or poor connections, repairing or replacing them as necessary.
  4. If the ignition coil is found to be faulty, replace it with a new, high-quality unit that is compatible with your Hyundai vehicle.
  5. Clear the trouble codes with the OBD-II scanner and test drive the vehicle to ensure that the issue has been resolved and that the check engine light has been extinguished.

Cost to Fix P0351 Hyundai

The typical repair costs for addressing the P0351 code on a Hyundai vehicle can vary depending on the specific cause of the issue and the cost of parts and labor in your area. Generally, replacing an ignition coil can cost between $100 and $300, including parts and labor. Additional costs may be incurred if wiring or connectors need to be repaired or if other components of the ignition system require attention. It's important to factor in the diagnosis time and labor rates at auto repair shops, which can range between $80 and $150 per hour. Rates may vary based on location, vehicle make and model, and engine type, so it's advisable to obtain quotes from multiple shops for a more accurate estimate.

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 P0351 Hyundai Code

1. What are the common symptoms of OBDII code P0351 on a Hyundai related to the Ignition Coil 'A' Primary/Secondary Circuit?

- Common symptoms include engine misfires, rough idling, loss of power, and in some cases, the Check Engine light illuminating.

2. What are the possible causes of OBDII code P0351 on a Hyundai?

- The code P0351 typically indicates a faulty ignition coil 'A', issues with the ignition coil circuit, wiring problems, or a failed Engine Control Module (ECM).

3. How can I diagnose the source of OBDII code P0351 on my Hyundai?

- To diagnose the issue, you can use a scan tool to check for additional trouble codes, inspect the ignition coil and related wiring for damage, and perform tests to determine the health of the ignition coil.

4. Can I continue driving my Hyundai with OBDII code P0351 present?

- It is not recommended to drive your vehicle with OBDII code P0351 as it can lead to further engine damage and potential safety hazards. It is best to address the issue promptly.

5. How can I repair OBDII code P0351 related to the Ignition Coil 'A' Primary/Secondary Circuit on a Hyundai?

- Repair options may include replacing the faulty ignition coil 'A', repairing damaged wiring or connections, and resetting the ECM after the issue has been resolved.

6. Is it possible to prevent OBDII code P0351 from occurring in the future on my Hyundai?

- Regular maintenance, such as inspecting and replacing ignition components as needed, can help prevent OBDII code P0351 from occurring. Keeping up with scheduled tune-ups is also beneficial.

7. Can a DIY enthusiast fix OBDII code P0351 on a Hyundai themselves?

- Depending on the individual's skill level and access to tools, some DIY enthusiasts may be able to diagnose and repair OBDII code P0351. However, professional assistance is recommended for accurate diagnosis and repair.

8. Will clearing the OBDII code P0351 on my Hyundai make it go away permanently?

- Clearing the code may temporarily turn off the Check Engine light, but if the underlying issue causing OBDII code P0351 is not resolved, the code is likely to return.

9. How long does it typically take to repair OBDII code P0351 on a Hyundai at a repair shop?

- The time needed to repair OBDII code P0351 can vary depending on the exact cause of the issue, but it generally takes a few hours to a full day for diagnosis and repair at a professional repair shop.

10. Are there any recalls or technical service bulletins related to OBDII code P0351 for Hyundai vehicles?

- It is recommended to check with Hyundai authorized service centers or online databases for any recalls or technical service bulletins related to OBDII code P0351 specific to your vehicle model and year.

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