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Engine-Codes – Generic – P0356

P0356 Code - Ignition Coil 6 Control Circuit

Quick Answer

The P0356 diagnostic trouble code (DTC) indicates a problem with the ignition coil 6 control circuit in the vehicle's engine. Common causes include Faulty Ignition Coil: The ignition coil itself may be faulty and not sending the proper signal to the PCM, Wiring Issues: Damaged or corroded wiring connections to the ignition coil can disrupt the control circuit, Connector Problems: A loose or damaged connector between the ignition coil and the PCM can cause the P0356 code to appear. 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
P0356 indicates Ignition Coil 6 Control Circuit.
Common causes
Common causes include Faulty Ignition Coil: The ignition coil itself may be faulty and not sending the proper signal to the PCM, Wiring Issues: Damaged or corroded wiring connections to the ignition coil can disrupt the control circuit, Connector Problems: A loose or damaged connector between the ignition coil and the PCM can cause the P0356 code to appear.
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 06, 2024
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Code P0356 Description

The P0356 diagnostic trouble code (DTC) indicates a problem with the ignition coil 6 control circuit in the vehicle's engine. The ignition coil is responsible for converting the low voltage from the battery into the high voltage needed to create a spark in the spark plugs, which in turn ignites the air-fuel mixture in the engine cylinders. In this case, the control circuit for ignition coil 6 is not functioning correctly, which can lead to misfires, rough engine performance, and potentially even engine stalling.

OBDII Code P0356 - Ignition Coil 6 Control Circuit
P0356 Code - Ignition Coil 6 Control Circuit

Common Causes of P0356

  1. Faulty Ignition Coil: The ignition coil itself may be faulty and not sending the proper signal to the PCM.
  2. Wiring Issues: Damaged or corroded wiring connections to the ignition coil can disrupt the control circuit.
  3. Connector Problems: A loose or damaged connector between the ignition coil and the PCM can cause the P0356 code to appear.
  4. PCM Malfunction: In rare cases, a malfunction in the PCM itself can trigger the P0356 code.

Symptoms of P0356

  1. Check Engine Light: The most common symptom associated with the P0356 code is the illumination of the check engine light on the dashboard.
  2. Engine Misfires: A faulty ignition coil control circuit can cause misfires in the affected cylinder, leading to rough idling, hesitation, and loss of power.
  3. Rough Engine Performance: The engine may run rough or exhibit poor performance due to the misfire caused by the faulty ignition coil control circuit.
  4. Engine Stalling: In severe cases, the engine may stall or have difficulty starting due to the lack of proper ignition in cylinder 6.

How to Fix P0356

  1. Diagnose the Issue: Use a scan tool to read the code and pinpoint the exact cause of the problem, whether it's a faulty ignition coil, wiring issue, or connector problem.
  2. Replace Ignition Coil: If the ignition coil is determined to be faulty, replace it with a new one to restore proper ignition in cylinder 6.
  3. Repair Wiring or Connector: If there are issues with the wiring or connector, repair or replace them as needed to ensure a proper connection.
  4. Clear Codes: After making the necessary repairs, clear the codes from the PCM and test drive the vehicle to ensure the issue has been resolved.

Cost to Fix P0356

The cost of repairing the ignition coil 6 control circuit can vary depending on the make and model of the vehicle, the location of the repair shop, and the cost of parts and labor. On average, the cost of replacing an ignition coil can range from $100 to $300, while the cost of diagnosing and repairing wiring or connector issues can add to the total cost. Overall, the repair for the P0356 code may cost between $150 and $500, including parts and labor. It's important to note that labor rates at auto repair shops can vary, so it's advisable to check local rates for a more accurate estimate.

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Code P0356 Information for Specific Makes

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 P0356 Code

1. What are the common symptoms of OBDII code P0356 (Ignition Coil 6 Control Circuit)?

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

2. What are the possible causes of OBDII code P0356?

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

3. How can I diagnose the cause of OBDII code P0356?

- Diagnosis typically involves inspecting the ignition coil for damage, checking the wiring and connectors for any issues, and performing tests using a scan tool to monitor the ignition coil control circuit.

4. Can a bad spark plug cause OBDII code P0356 to appear?

- Yes, a bad spark plug can potentially cause problems with ignition coil operation, leading to the triggering of code P0356.

5. How can I repair OBDII code P0356?

- Repair options may include replacing the faulty ignition coil, repairing damaged wiring or connectors, and clearing the code with a scan tool after addressing the root cause.

6. Is it safe to drive with OBDII code P0356 present?

- It is generally not recommended to drive with code P0356 as it can lead to engine performance issues and potential damage if left unresolved.

7. Can I reset OBDII code P0356 without fixing the underlying issue?

- While you can clear the code temporarily, it is important to address the root cause to prevent the code from reappearing and to ensure proper engine function.

8. How much does it typically cost to repair OBDII code P0356 at a mechanic?

- The cost of repairing code P0356 can vary depending on the specific cause and the labor rates of the mechanic, but it may range from $100 to $300 on average.

9. Are there any preventive measures to avoid OBDII code P0356 in the future?

- Regular maintenance, such as replacing spark plugs and ignition coils at recommended intervals, can help prevent issues that may trigger code P0356.

10. How long does it usually take to repair OBDII code P0356?

- The repair time for code P0356 can vary based on the cause and complexity of the issue, but it may take anywhere from 1-3 hours to complete the repair.

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