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P2306 Ford Code - Ignition Coil 'C' Primary Control Circuit Low

Quick Answer

The P2306 diagnostic trouble code (DTC) for Ford vehicles indicates a problem with the ignition coil 'C' primary control circuit being low. Common causes include Faulty ignition coil 'C', Wiring issues in the primary control circuit, Defective engine control module (ECM). 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
P2306 Ford indicates Ignition Coil 'C' Primary Control Circuit Low.
Common causes
Common causes include Faulty ignition coil 'C', Wiring issues in the primary control circuit, Defective engine control module (ECM).
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 07, 2024
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Code P2306 Ford Description

The P2306 diagnostic trouble code (DTC) for Ford vehicles indicates a problem with the ignition coil 'C' primary control circuit being low. This means that there is a malfunction in the circuit responsible for controlling the primary ignition coil for cylinder 'C'. 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 sparks in the spark plugs, which ignite the fuel-air mixture in the engine cylinders.

OBDII Code P2306 Ford - Ignition Coil 'C' Primary Control Circuit Low
P2306 Ford Code - Ignition Coil 'C' Primary Control Circuit Low

Common Causes of P2306 Ford

  1. Faulty ignition coil 'C'
  2. Wiring issues in the primary control circuit
  3. Defective engine control module (ECM)
  4. Poor connection in the ignition coil circuit
  5. Corrosion or damage to electrical components

Symptoms of P2306 Ford

  1. Engine misfires
  2. Difficulty starting the engine
  3. Loss of power
  4. Check Engine Light illuminated
  5. Rough idling

How to Fix P2306 Ford

  1. Begin by inspecting the wiring and connections in the primary control circuit for ignition coil 'C'. Look for any signs of damage, corrosion, or loose connections. Repair or replace any faulty wiring or connectors.
  2. Test the ignition coil 'C' to determine if it is functioning correctly. Replace the ignition coil if it is found to be faulty.
  3. Check the engine control module (ECM) for any signs of damage or malfunction. If necessary, reprogram or replace the ECM.
  4. Clear the fault code from the vehicle's computer using an OBD-II scanner. Test drive the vehicle to ensure the issue has been resolved.
  5. If the problem persists, further diagnostic testing may be required to pinpoint the exact cause of the issue.

Cost to Fix P2306 Ford

The typical repair costs for addressing the P2306 Ford diagnostic trouble code can range from $150 to $400, depending on the specific cause of the issue and the parts needed for repair. This estimate includes the cost of replacement parts, labor, and any additional diagnostic testing that may be required. It's important to note that labor rates at auto repair shops can vary, with hourly rates typically falling between $80 and $150. Factors such as the vehicle make and model, location, and engine type can also impact the final repair costs. For a more accurate estimate, it's recommended to consult with a local auto repair shop.

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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 P2306 Ford Code

1. What are the common symptoms of OBDII code P2306 in a Ford related to the Ignition Coil 'C' Primary Control Circuit Low?

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

2. What are the possible causes of OBDII code P2306 in a Ford indicating the Ignition Coil 'C' Primary Control Circuit Low?

Potential causes include a faulty ignition coil, damaged wiring or connectors in the ignition coil circuit, a failed PCM (powertrain control module), or issues with the spark plug related to that specific coil.

3. How can I diagnose OBDII code P2306 in a Ford for the Ignition Coil 'C' Primary Control Circuit Low?

Diagnosis typically involves inspecting the ignition coil, checking the wiring and connectors for damage, testing the PCM, and verifying the spark plug's condition.

4. Can driving with OBDII code P2306 in a Ford, signaling the Ignition Coil 'C' Primary Control Circuit Low, cause further damage to the vehicle?

Continuing to drive with this issue can potentially lead to more severe engine problems, reduced fuel efficiency, and even catalytic converter damage over time.

5. Is it safe to clear the OBDII code P2306 related to the Ignition Coil 'C' Primary Control Circuit Low in a Ford without addressing the underlying issue?

Clearing the code without fixing the root cause can temporarily turn off the Check Engine Light, but the problem will likely reoccur, and the vehicle may experience ongoing performance issues.

6. How can I repair OBDII code P2306 in a Ford associated with the Ignition Coil 'C' Primary Control Circuit Low?

Repairing this code typically involves replacing the faulty ignition coil, repairing or replacing damaged wiring or connectors, and ensuring the spark plug is in good condition.

7. Can a DIY enthusiast fix OBDII code P2306 in a Ford tied to the Ignition Coil 'C' Primary Control Circuit Low?

Depending on their skill level and access to tools, a DIY enthusiast may be able to address this code by following a repair manual or online guides, but professional assistance is recommended.

8. Are there any preventive measures to avoid OBDII code P2306 in a Ford linked to the Ignition Coil 'C' Primary Control Circuit Low?

Regularly scheduled maintenance, such as checking and replacing spark plugs, inspecting ignition components, and addressing any engine performance issues promptly, can help prevent this code from occurring.

9. How long does it typically take to repair OBDII code P2306 in a Ford concerning the Ignition Coil 'C' Primary Control Circuit Low?

The repair time can vary depending on the extent of the issue and the availability of parts, but a professional mechanic can usually resolve this problem within a few hours.

10. Will OBDII code P2306 in a Ford connected to the Ignition Coil 'C' Primary Control Circuit Low affect the vehicle's overall drivability?

While the vehicle may still be operational with this code present, drivability issues such as rough idling and reduced power may occur, affecting the overall performance and efficiency of the vehicle.

Discuss the causes and fixes for P2306 Ford OBDII Code

Submit a New Comment

  • These codes are new to me . We are just starting to see these i have 2013 f150. 3.5 turbo . P2306 and p2309 are stored . Both cylinders 3 and 4 are not firing . Swapped both coils with known good coils and no change. Customer has changed all 6 plugs and 1 coil before he left it with me to check. I am needing a wiring diagram . Any input would help. Thank in advance.

    Reply to Comment

  • Here is the only wire diagram I have. I hope it helps

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    Click here to enlarge image

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