AutoCodes – Audi – P2311 Audi

P2311 Audi Code - Ignition Coil 4 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 4, Ignition Coil 4 harness is open or shorted, Ignition Coil 4 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: P2311 Audi indicates Ignition Coil 4 Secondary Circuit.
Common causes: Common causes include Faulty Ignition Coil 4, Ignition Coil 4 harness is open or shorted, Ignition Coil 4 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 2,164

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

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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 P2311 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 P2311 code sets when the PCM detects a short to voltage in the circuit.

OBDII Code P2311 Audi - Ignition Coil 4 Secondary Circuit - AutoCodes.com — P2311 Audi Code - Ignition Coil 4 Secondary Circuit

What does this mean?

What are the Possible Causes of the DTC P2311 Audi?

Faulty Ignition Coil 4
Ignition Coil 4 harness is open or shorted
Ignition Coil 4 circuit poor electrical connection

How to Fix the DTC P2311 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 P2311 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 P2311 Audi Code

1. What does the OBDII code P2311 mean on an Audi?

P2311 indicates a fault in the secondary circuit of ignition coil 4, which may affect the vehicle's ability to ignite the air-fuel mixture in cylinder 4.

2. What are the common symptoms of the P2311 code in an Audi?

Symptoms include engine misfires, rough idling, reduced fuel efficiency, lack of power, and the Check Engine Light illuminating.

3. What causes the P2311 code to appear on an Audi?

Common causes include a faulty ignition coil, damaged ignition coil wiring or connectors, a malfunctioning spark plug, or issues with the engine control module (ECM).

4. Can I drive my Audi with the P2311 code?

Driving with P2311 is not recommended as it can cause further engine damage or catalytic converter issues due to unburned fuel entering the exhaust system.

5. How do I diagnose the P2311 code on an Audi?

Start by inspecting ignition coil 4 and its wiring for damage. Use a multimeter to test the coil and check for proper voltage. Scan for additional codes to identify related issues.

6. How do I fix the P2311 code on an Audi?

Repairs may include replacing ignition coil 4, repairing or replacing damaged wiring or connectors, changing the spark plug, or reprogramming the ECM if necessary.

7. How much does it cost to repair the P2311 code on an Audi?

The cost varies; replacing an ignition coil typically costs $100â€“$300, while additional repairs or diagnostics may increase the total.

8. Can a faulty spark plug cause the P2311 code?

Yes, a worn or damaged spark plug in cylinder 4 can cause ignition coil 4 to malfunction, triggering the P2311 code.

9. How can I prevent the P2311 code from occurring again?

Regular maintenance, such as replacing spark plugs and coils as recommended, and inspecting wiring for damage, can help prevent this issue.

10. Will clearing the P2311 code fix the problem?

Clearing the code without addressing the underlying issue will not fix the problem, and the code is likely to return. Proper diagnosis and repair are necessary.