AutoCodes – Ford – P2308 Ford

P2308 Ford Code - Ignition Coil 'C' Secondary Circuit

Quick Answer

The current flow, or dwell, through the primary ignition coil is controlled by the Powertrain Control Module (PCM) by providing a switched ground path through the ignition coil driver to ground. Common causes include Faulty Ignition Coil 'C', Ignition Coil 'C' harness is open or shorted, Ignition Coil 'C' 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: P2308 Ford indicates Ignition Coil 'C' Secondary Circuit.
Common causes: Common causes include Faulty Ignition Coil 'C', Ignition Coil 'C' harness is open or shorted, Ignition Coil 'C' 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 1,704

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jun 14, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P2308 Ford Description

The current flow, or dwell, through the primary ignition coil is controlled by the Powertrain Control Module (PCM) by providing a switched ground path through the ignition coil driver to ground. When the ignition coil driver is switched on, current rapidly builds up to a maximum value, determined by the coil inductance and resistance. When the current is switched off, the magnetic field collapses which induces a secondary high voltage surge and the spark plug is fired. This high voltage surge creates a flyback voltage which the PCM uses as a feedback during the ignition diagnostics. The PCM continuously monitors the ignition system for concerns. The P2308 code sets when the PCM detects a short to voltage in the circuit.

OBDII Code P2308 Ford - Ignition Coil 'C' Secondary Circuit - AutoCodes.com — P2308 Ford Code - Ignition Coil 'C' Secondary Circuit

What does this mean?

What are the Possible Causes of the DTC P2308 Ford?

Faulty Ignition Coil 'C'
Ignition Coil 'C' harness is open or shorted
Ignition Coil 'C' circuit poor electrical connection

How to Fix the DTC P2308 Ford?

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 P2308 Ford 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.

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Need more information on how to fix the P2308 Ford code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P2308 Ford code diagnosed by a professional: Find a repair shop in your area

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 P2308 Ford Code

1. What are the common symptoms of OBDII code P2308 Ford (Ignition Coil 'C' Secondary Circuit)?

- Common symptoms include engine misfires, rough idling, lack of power, and illuminated Check Engine Light.

2. What are the possible causes of OBDII code P2308 Ford?

- The code P2308 typically points to issues such as a faulty ignition coil 'C', damaged wiring or connectors in the ignition coil circuit, or a problem with the Engine Control Module (ECM).

3. How can I diagnose the cause of OBDII code P2308 Ford?

- Diagnosis involves checking the ignition coil 'C' for proper functioning, inspecting the wiring and connectors for any damage, and using a scan tool to retrieve freeze frame data for additional clues.

4. Can a bad spark plug cause OBDII code P2308 Ford to appear?

- Yes, a faulty spark plug can lead to misfires and trigger the P2308 code, as the spark plug is essential for the ignition process in the combustion chamber.

5. How do I repair OBDII code P2308 Ford?

- Repair options may include replacing the faulty ignition coil 'C', repairing any damaged wiring or connectors, or addressing any underlying issues with the Engine Control Module (ECM).

6. Is it safe to continue driving with OBDII code P2308 Ford present?

- It is not recommended to drive with the P2308 code active, as it can lead to poor engine performance, potential damage to the catalytic converter, and increased emissions.

7. Can I reset OBDII code P2308 Ford using a diagnostic tool?

- Yes, a diagnostic tool can be used to clear the code after the underlying issue has been identified and repaired. However, if the problem persists, the code will reappear.

8. Are there any preventive maintenance tips to avoid OBDII code P2308 Ford?

- Regularly inspecting and maintaining the ignition system components, such as the ignition coils and spark plugs, can help prevent issues that may trigger the P2308 trouble code.

9. What is the typical cost to repair OBDII code P2308 Ford?

- The cost of repair can vary depending on the specific cause of the code, but it may involve replacing the ignition coil 'C', repairing wiring, or addressing ECM issues. Costs can range from $100 to $300 or more.

10. Can a DIY enthusiast fix OBDII code P2308 Ford at home?

- Depending on the individual's skill level and access to tools, a DIY enthusiast may be able to address the P2308 code by following repair guides, but it is recommended to consult a professional if unsure.