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Engine-Codes – Generic – P2308

P2308 Code - Ignition Coil 'C' Secondary Circuit

Quick Answer

The diagnostic trouble code P2308 indicates an issue with the ignition coil 'C' secondary circuit. Common causes include Faulty ignition coil 'C', Damaged wiring or connectors in the secondary circuit, Defective spark plugs. 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
P2308 indicates Ignition Coil 'C' Secondary Circuit.
Common causes
Common causes include Faulty ignition coil 'C', Damaged wiring or connectors in the secondary circuit, Defective spark plugs.
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 Aug 30, 2024
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Code P2308 Description

The diagnostic trouble code P2308 indicates an issue with the ignition coil 'C' secondary circuit. The ignition coil is responsible for converting the low voltage from the battery into the high voltage needed to ignite the fuel in the combustion chamber. The secondary circuit refers to the wiring and components that deliver this high voltage spark to the spark plug. When this circuit malfunctions, it can lead to misfires, rough idling, and poor acceleration, affecting the vehicle's overall performance.

OBDII Code P2308 - Ignition Coil 'C' Secondary Circuit
P2308 Code - Ignition Coil 'C' Secondary Circuit

Common Causes of P2308

  1. Faulty ignition coil 'C'
  2. Damaged wiring or connectors in the secondary circuit
  3. Defective spark plugs
  4. Malfunctioning ignition control module
  5. Electrical issues such as corroded terminals or loose connections

Symptoms of P2308

  1. Engine misfires
  2. Rough idling or vibrations
  3. Decreased fuel efficiency
  4. Engine hesitation or lack of power
  5. Illumination of the check engine light

How to Fix P2308

  1. Begin by diagnosing the specific cause of the issue using a diagnostic scanner to confirm the P2308 code.
  2. Inspect the ignition coil 'C', wiring, and connectors for any visible damage or wear.
  3. Test the ignition coil 'C' for proper resistance and continuity.
  4. Replace any faulty components such as the ignition coil, spark plugs, or wiring as needed.
  5. Clear the diagnostic trouble codes, reset the vehicle's computer, and test drive to ensure the issue has been resolved.

Cost to Fix P2308

The cost of repairing an ignition coil 'C' secondary circuit issue can vary depending on the extent of the damage and the specific components that need replacement. On average, the parts for this repair can range from $50 to $150, while labor costs can add an additional $100 to $200. Overall, the total repair cost could fall between $150 and $350. It is recommended to consult with a mechanic or auto repair shop for a more accurate estimate based on your vehicle's make and model. Labor rates and diagnostic fees can also impact the final cost of the repair.

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Code P2308 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.

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