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Engine-Codes – GMC – P0356 GMC

P0356 GMC Code - Ignition Coil 6 Control Circuit

Quick Answer

The P0356 GMC diagnostic trouble code indicates a problem with the ignition coil 6 control circuit in the vehicle. Common causes include Faulty ignition coil, Wiring or connector issues, ECM failure. 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 GMC indicates Ignition Coil 6 Control Circuit.
Common causes
Common causes include Faulty ignition coil, Wiring or connector issues, ECM failure.
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 12, 2024
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Code P0356 GMC Description

The P0356 GMC diagnostic trouble code indicates a problem with the ignition coil 6 control circuit in the vehicle. 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 create a spark in the spark plugs. Ignition coil 6 specifically refers to the coil associated with the sixth cylinder in the engine.

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

Common Causes of P0356 GMC

  1. Faulty ignition coil
  2. Wiring or connector issues
  3. ECM failure
  4. Corrosion or damage to components
  5. Electrical system problems

Symptoms of P0356 GMC

  1. Engine misfires
  2. Rough idling
  3. Stalling
  4. Poor acceleration
  5. Increased fuel consumption

How to Fix P0356 GMC

  1. Perform a thorough inspection of the ignition coil 6 control circuit.
  2. Test the wiring and connectors for continuity and repair any faults.
  3. Check the resistance of the ignition coil and replace if necessary.
  4. Inspect the ECM for any signs of damage or malfunction and address accordingly.
  5. Clear the trouble code and test drive the vehicle to ensure the issue has been resolved.

Cost to Fix P0356 GMC

The cost of repairing the ignition coil 6 control circuit can vary depending on the specific cause of the issue and the labor rates at the auto repair shop. In general, the cost of replacing an ignition coil can range from $100 to $300, including parts and labor. Additional costs may apply if other components need to be replaced or if there are underlying electrical system problems. It's advisable to consult with a qualified mechanic to get a more accurate estimate based on the specific circumstances of the vehicle.

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Information for Specific GMC Models

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.

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