AutoCodes – Audi – P0358 Audi

P0358 Audi Code - Ignition Coil 8 Primary/Secondary Circuit Malfunction

Quick Answer

The ignition system on the vehicle uses individual ignition coils for each cylinder. Common causes include Faulty Ignition Coil 8, Ignition Coil 8 harness is open or shorted, Ignition Coil 8 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: P0358 Audi indicates Ignition Coil 8 Primary/Secondary Circuit Malfunction.
Common causes: Common causes include Faulty Ignition Coil 8, Ignition Coil 8 harness is open or shorted, Ignition Coil 8 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 5,560

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Intermediate (2 / 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 P0358 Audi Description

The ignition system on the vehicle uses individual ignition coils for each cylinder. The Engine Control Module (ECM) controls each ignition coil operation. The ECM sends a ON/OFF signal to energize the ignition coil to create a spark at the spark plug when a spark is required at the cylinder.

OBDII Code P0358 Audi - Ignition Coil 8 Primary/Secondary Circuit Malfunction - AutoCodes.com — P0358 Audi Code - Ignition Coil 8 Primary/Secondary Circuit Malfunction

What does this mean?

What are the Possible Causes of the DTC P0358 Audi?

Faulty Ignition Coil 8
Ignition Coil 8 harness is open or shorted
Ignition Coil 8 circuit poor electrical connection
Faulty Engine Control Module (ECM)

How to Fix the DTC P0358 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 P0358 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.

Need more information about the P0358 Audi code?

Need more information on how to fix the P0358 Audi code? Get Access to Factory Service Manuals

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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 P0358 Audi Code

1. What does the OBDII code P0358 mean on an Audi?

P0358 indicates a malfunction in the ignition coil primary or secondary circuit for cylinder 8, meaning there could be an issue with the coil, wiring, or related components.

2. What are the symptoms of a P0358 code on an Audi?

Common symptoms include misfires, rough idling, reduced engine performance, poor fuel economy, and the Check Engine Light being illuminated.

3. What causes the P0358 code to appear on an Audi?

Possible causes include a faulty ignition coil for cylinder 8, damaged wiring or connectors in the ignition circuit, a defective spark plug, or a malfunctioning engine control module (ECM).

4. Can I drive my Audi with a P0358 code?

It is not recommended to drive with a P0358 code, as misfires may cause further engine damage or catalytic converter issues.

5. How do I diagnose the P0358 code on an Audi?

Start by inspecting the ignition coil for cylinder 8, checking wiring and connectors for damage, testing the spark plug, and using a multimeter to measure circuit continuity.

6. How do I fix the P0358 code on an Audi?

Repairs may include replacing the ignition coil for cylinder 8, repairing damaged wiring or connectors, replacing a faulty spark plug, or updating/replacing the ECM if necessary.

7. How much does it cost to fix the P0358 code on an Audi?

The cost can range from $50 to $150 for a new ignition coil, plus labor, depending on your location and vehicle model. Additional costs may apply if wiring or ECM repairs are needed.

8. Can a bad spark plug cause the P0358 code on an Audi?

Yes, a worn or damaged spark plug in cylinder 8 can cause the ignition coil to malfunction, triggering the P0358 code.

9. How can I prevent the P0358 code from recurring on my Audi?

Regular maintenance, including timely spark plug and ignition coil replacement, and inspecting wiring for wear, can help prevent this code.

10. Does a P0358 code mean the ECM is bad on my Audi?

Not necessarily. While a faulty ECM can cause this code, it is more commonly due to issues with the ignition coil, wiring, or spark plug in cylinder 8.