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Engine-Codes – GMC – P1366 GMC

P1366 GMC Code - Ignition Control Cylinder 6 Not Toggling After Enable

Quick Answer

The P1366 diagnostic trouble code for GMC vehicles indicates an issue with the ignition control cylinder 6 not toggling after enable. Common causes include Faulty ignition control module, Defective ignition coil pack, Wiring or connection issues in the ignition system. 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
P1366 GMC indicates Ignition Control Cylinder 6 Not Toggling After Enable.
Common causes
Common causes include Faulty ignition control module, Defective ignition coil pack, Wiring or connection issues in the ignition system.
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 17, 2024
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Code P1366 GMC Description

The P1366 diagnostic trouble code for GMC vehicles indicates an issue with the ignition control cylinder 6 not toggling after enable. This means that the Engine Control Module (ECM) has detected a problem with the ignition system in cylinder 6, which can lead to misfires, poor engine performance, and potential damage if left unresolved.

OBDII Code P1366 GMC - Ignition Control Cylinder 6 Not Toggling After Enable
P1366 GMC Code - Ignition Control Cylinder 6 Not Toggling After Enable

Common Causes of P1366 GMC

  1. Faulty ignition control module
  2. Defective ignition coil pack
  3. Wiring or connection issues in the ignition system
  4. Vacuum leaks affecting cylinder 6
  5. ECM software malfunction

Symptoms of P1366 GMC

  1. Rough idle or engine misfires
  2. Decreased fuel efficiency
  3. Loss of engine power
  4. Check Engine Light illuminated
  5. Engine hesitation or stalling

How to Fix P1366 GMC

  1. Use a scan tool to diagnose the specific issue with the ignition control cylinder 6.
  2. Inspect the ignition control module and coil pack for signs of damage or wear.
  3. Check the wiring and connections related to cylinder 6 for any faults or breaks.
  4. Replace the faulty ignition control module or coil pack as needed.
  5. Clear the trouble code from the ECM and test drive the vehicle to ensure the issue has been resolved.

Cost to Fix P1366 GMC

The typical repair costs for addressing the P1366 code can vary depending on the specific cause of the issue. In general, replacing an ignition control module or coil pack can range from $150 to $300 for parts, with additional labor costs of $100 to $200. However, it's important to note that diagnosis time and labor rates at auto repair shops can vary, so it's advisable to check with local shops for a more accurate estimate based on your vehicle make and model.

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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.

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