AutoCodesChevrolet – P0356 2018 Chevrolet Silverado

P0356 2018 Chevrolet Silverado 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 2018 Chevrolet Silverado 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 313
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Mar 25, 2024
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Code P0356 2018 Chevrolet Silverado 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 2018 Chevrolet Silverado - Ignition Coil 6 Control Circuit - AutoCodes.com
P0356 2018 Chevrolet Silverado Code - Ignition Coil 6 Control Circuit

What are the Possible Causes of the DTC P0356 2018 Chevrolet Silverado?

  • 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 2018 Chevrolet Silverado?

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 2018 Chevrolet Silverado 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 2018 Chevrolet Silverado code?

Need more information on how to fix the P0356 2018 Chevrolet Silverado 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 2018 Chevrolet Silverado Code

1. What does the OBDII code P0356 mean on a 2018 Chevrolet Silverado?

P0356 indicates a malfunction in the ignition coil 6 control circuit, which affects the proper operation of cylinder 6.

2. What are common symptoms of code P0356 on a 2018 Chevy Silverado?

Symptoms include engine misfires, rough idling, reduced power, poor fuel economy, and possibly a check engine light.

3. What causes the P0356 code on a 2018 Chevrolet Silverado?

Common causes include a faulty ignition coil, damaged wiring or connectors, a malfunctioning PCM, or issues with the spark plug in cylinder 6.

4. Can I drive my 2018 Chevy Silverado with code P0356?

Driving with this code can lead to engine misfires and potential damage. It’s best to address the issue promptly to avoid further complications.

5. How do you diagnose code P0356 on a 2018 Chevrolet Silverado?

Diagnosis involves inspecting ignition coil 6, checking for wiring or connector damage, testing the circuit with a multimeter, and ensuring the PCM is functioning properly.

6. How do you fix the P0356 code on a 2018 Chevy Silverado?

Repairs may involve replacing the ignition coil, repairing or replacing damaged wiring and connectors, or replacing the spark plug for cylinder 6.

7. How much does it cost to fix code P0356 on a 2018 Chevrolet Silverado?

Repair costs can vary but typically range from $100 to $300, depending on whether the ignition coil, wiring, or spark plug needs replacement.

8. Can a bad ignition coil cause code P0356 on a 2018 Chevrolet Silverado?

Yes, a failed ignition coil is a common cause of this code and should be inspected during diagnosis.

9. Will replacing the spark plug fix code P0356 on a 2018 Chevy Silverado?

If the spark plug is faulty or damaged, replacing it may resolve the issue, but the ignition coil and wiring should also be checked.

10. Does code P0356 affect the performance of my 2018 Chevrolet Silverado?

Yes, this code can lead to reduced engine performance, misfires, and poor fuel efficiency, impacting overall drivability.

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