AutoCodes – Audi – P2306 Audi

P2306 Audi Code - Ignition Coil 3 Primary Control Circuit Low

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 3, Ignition Coil 3 harness is open or shorted, Ignition Coil 3 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: P2306 Audi indicates Ignition Coil 3 Primary Control Circuit Low.
Common causes: Common causes include Faulty Ignition Coil 3, Ignition Coil 3 harness is open or shorted, Ignition Coil 3 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 2,600

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 P2306 Audi 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 P2306 code sets when the PCM detects a short to voltage in the circuit.

OBDII Code P2306 Audi - Ignition Coil 3 Primary Control Circuit Low - AutoCodes.com — P2306 Audi Code - Ignition Coil 3 Primary Control Circuit Low

What does this mean?

What are the Possible Causes of the DTC P2306 Audi?

Faulty Ignition Coil 3
Ignition Coil 3 harness is open or shorted
Ignition Coil 3 circuit poor electrical connection

How to Fix the DTC P2306 Audi?

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 P2306 Audi 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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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 Audi Code

1. What are the common symptoms of OBDII code P2306 in an Audi related to the Ignition Coil 3 Primary Control Circuit Low?

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

2. What are the possible causes of OBDII code P2306 in an Audi?

- The code P2306 in an Audi is typically caused by a faulty ignition coil, damaged wiring or connectors, or issues with the Engine Control Module (ECM).

3. How can I diagnose the Ignition Coil 3 Primary Control Circuit Low issue in my Audi?

- To diagnose the issue, you can use an OBDII scanner to retrieve the fault code, visually inspect the ignition coil and related wiring for any damage, and perform a continuity test on the circuit.

4. Can I still drive my Audi with OBDII code P2306 present?

- It is not recommended to drive your Audi with code P2306 present, as it can lead to further damage to the ignition system and engine components.

5. How do I repair OBDII code P2306 related to the Ignition Coil 3 Primary Control Circuit Low in my Audi?

- The repair typically involves replacing the faulty ignition coil, repairing any damaged wiring or connectors, and clearing the fault code with an OBDII scanner.

6. Can a DIY enthusiast fix OBDII code P2306 in an Audi?

- Depending on your level of automotive expertise, you may be able to replace the ignition coil or repair wiring yourself. However, it is recommended to consult a professional mechanic for proper diagnosis and repair.

7. What happens if I ignore OBDII code P2306 in my Audi?

- Ignoring code P2306 can lead to poor engine performance, decreased fuel efficiency, and potential damage to other engine components over time.

8. How much does it cost to repair OBDII code P2306 in an Audi at a mechanic?

- The cost of repairing OBDII code P2306 in an Audi can vary depending on the extent of the issue, but it typically ranges from $150 to $300 for parts and labor.

9. Are there any preventative maintenance tips to avoid OBDII code P2306 in my Audi?

- Regularly servicing your Audi, including replacing ignition coils at recommended intervals, can help prevent issues like code P2306 related to the Ignition Coil 3 Primary Control Circuit Low.

10. Can weather conditions impact the occurrence of OBDII code P2306 in an Audi?

- Extreme weather conditions, such as excessive heat or moisture, can sometimes exacerbate issues related to the ignition system and contribute to the occurrence of code P2306 in an Audi.