AutoCodes – GMC – P0356 2017 GMC Sierra

P0356 2017 GMC Sierra Code - Ignition Coil 6 Control Circuit

Quick Answer

The ignition system on this engine uses ignition coils with integrated power transistors. Common causes include Faulty Ignition Coil 6, Ignition Coil 6 harness is open or shorted, Ignition Coil 6 circuit poor electrical connection. 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 2017 GMC Sierra indicates Ignition Coil 6 Control Circuit.
Common causes: Common causes include Faulty Ignition Coil 6, Ignition Coil 6 harness is open or shorted, Ignition Coil 6 circuit poor electrical connection.
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.

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Code Popularity 234

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Mar 25, 2024

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0356 2017 GMC Sierra Description

The ignition system on this engine uses ignition coils with integrated power transistors. The Engine Control Module (ECM) controls the spark event for each cylinder through individual ignition coil control circuits. When the ECM commands the ignition control circuit On, electrical current flows through the primary winding of the ignition coil, creating a magnetic field. When a spark event is requested, the ECM commands the ignition control circuit Off, interrupting current flow through the primary winding. The collapsing magnetic field created by the primary winding induces a high voltage in the secondary winding, which is connected to the spark plugs. The Diagnostic Trouble Code (DTC) will be set when the control circuit commanded by the ECM state does not match the actual state.

OBDII Code P0356 2017 GMC Sierra - Ignition Coil 6 Control Circuit - AutoCodes.com — P0356 2017 GMC Sierra Code - Ignition Coil 6 Control Circuit

What does this mean?

What are the Possible Causes of the DTC P0356 2017 GMC Sierra?

Faulty Ignition Coil 6
Ignition Coil 6 harness is open or shorted
Ignition Coil 6 circuit poor electrical connection
Faulty Engine Control Module (ECM)

How to Fix the DTC P0356 2017 GMC Sierra?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0356 2017 GMC Sierra code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the P0356 2017 GMC Sierra code?

Need more information on how to fix the P0356 2017 GMC Sierra code? Get Access to Factory Service Manuals

Need Help with the Code?

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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 P0356 2017 GMC Sierra Code

1. What are common symptoms of OBDII code P0356 in a 2017 GMC Sierra?

The most common symptoms include rough engine idle, misfires, loss of power, and illuminated check engine light.

2. What does the OBDII code P0356 for Ignition Coil 6 Control Circuit mean?

It indicates a problem with the ignition coil control circuit for cylinder 6 in your 2017 GMC Sierra's engine.

3. What are the possible causes of OBDII code P0356 in a 2017 GMC Sierra?

Potential causes include a faulty ignition coil, damaged wiring or connectors in the ignition coil circuit, or issues with the PCM (powertrain control module).

4. How can I diagnose the issue related to OBDII code P0356 in my 2017 GMC Sierra?

You can use a scan tool to check for additional trouble codes, perform a visual inspection of the ignition coil and its wiring, and conduct tests on the ignition coil and related components.

5. Can I still drive my 2017 GMC Sierra with OBDII code P0356 present?

It is not recommended to drive your vehicle with this code as it can lead to further engine damage and potential safety hazards.

6. How do I repair OBDII code P0356 in my 2017 GMC Sierra?

Common repairs include replacing the faulty ignition coil, repairing or replacing damaged wiring or connectors, and resetting the PCM after the issue has been resolved.

7. Can a DIY enthusiast fix OBDII code P0356 in a 2017 GMC Sierra?

While some basic troubleshooting steps can be performed by DIY enthusiasts, diagnosing and repairing this code may require specialized tools and expertise, so it's advisable to consult a professional mechanic.

8. How much does it cost to repair OBDII code P0356 in a 2017 GMC Sierra?

The cost of repairing this code can vary depending on the extent of the issue, parts needed, and labor rates. It's recommended to get a diagnosis from a mechanic for an accurate estimate.

9. Are there any preventive measures to avoid OBDII code P0356 in a 2017 GMC Sierra?

Regular maintenance, such as timely spark plug and ignition coil replacements, can help prevent issues that may trigger this code.

10. How long does it typically take to repair OBDII code P0356 in a 2017 GMC Sierra?

The repair time can vary based on the exact cause of the issue and the availability of parts. It's best to consult with a mechanic for an estimate on the repair timeline.