AutoCodes – Volkswagen – P2308 Volkswagen

P2308 Volkswagen Code - Ignition Coil 3 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 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: P2308 Volkswagen indicates Ignition Coil 3 Secondary Circuit.
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 3,660

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 Volkswagen 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 Volkswagen - Ignition Coil 3 Secondary Circuit - AutoCodes.com — P2308 Volkswagen Code - Ignition Coil 3 Secondary Circuit

What does this mean?

What are the Possible Causes of the DTC P2308 Volkswagen?

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

How to Fix the DTC P2308 Volkswagen?

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 Volkswagen 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 P2308 Volkswagen Code

1. What does the OBDII code P2308 mean for a Volkswagen?

P2308 indicates an issue with the ignition coil 3 secondary circuit, which is responsible for delivering the spark to ignite the air-fuel mixture in cylinder 3.

2. What are the common symptoms of P2308 in a Volkswagen?

Symptoms may include engine misfires, rough idling, reduced power, poor fuel economy, and the Check Engine Light illuminating.

3. What causes the P2308 code to appear?

Common causes include a faulty ignition coil, damaged wiring or connectors in the ignition circuit, a defective spark plug, or a malfunctioning powertrain control module (PCM).

4. Can I drive with a P2308 code?

Driving with a P2308 code is not recommended, as it can lead to further engine damage, increased emissions, and reduced performance.

5. How do I diagnose the P2308 code on my Volkswagen?

Start by inspecting the ignition coil 3, wiring, and connectors for damage or corrosion. Use a multimeter to test the coil and verify proper voltage and continuity.

6. How do I fix the P2308 code on my Volkswagen?

Repairs may involve replacing the faulty ignition coil, repairing damaged wiring or connectors, replacing spark plugs, or reprogramming the PCM if necessary.

7. Is P2308 specific to a certain cylinder in my Volkswagen?

Yes, P2308 specifically refers to an issue with the ignition coil secondary circuit for cylinder 3.

8. How much does it cost to fix a P2308 code?

Repair costs can range from $100 to $500 or more, depending on whether you need a simple ignition coil replacement or additional repairs like wiring fixes or PCM reprogramming.

9. Can a bad spark plug cause the P2308 code?

Yes, a worn or damaged spark plug in cylinder 3 can cause the ignition coil to fail or trigger the P2308 code.

10. How can I prevent the P2308 code from reoccurring?

Regular maintenance, such as timely replacement of spark plugs and ignition coils, and inspecting wiring for wear, can help prevent recurrence of the P2308 code.