Audi A3 trouble code 00668 can be a frustrating issue, but understanding its meaning and potential causes can empower you to fix it effectively. This guide provides a comprehensive overview of the 00668 fault code, its symptoms, diagnostic procedures, and common solutions.

After the opening paragraph, you can find a link to a resource with further information about this trouble code: code defaut 00668 audi a3

What Does Trouble Code 00668 Mean?

Trouble code 00668 in an Audi A3 typically refers to a malfunction within the intake manifold flap control system. Specifically, it indicates a problem with the intake manifold runner control circuit, often referred to as the “IMRC.” This system optimizes air intake based on engine speed and load.

What are the Common Symptoms of Trouble Code 00668?

The symptoms associated with the 00668 code can vary, but common indicators include:

• Reduced engine performance and power
• Poor fuel economy
• Rough idling
• Hesitation or stumbling during acceleration
• Check engine light illuminated

How to Diagnose Audi A3 Trouble Code 00668

Proper diagnosis is crucial for resolving the 00668 code. Here’s a step-by-step approach:

1. Retrieve the fault code: Use a compatible OBD-II scanner to confirm the presence of the 00668 code.
2. Visually inspect the intake manifold: Check for any loose connections, damaged wiring, or vacuum leaks around the intake manifold and related components.
3. Check the intake manifold runner control valve: Inspect the valve for proper operation. A faulty valve may be sticking or not responding to commands from the engine control unit (ECU).
4. Test the wiring and connectors: Use a multimeter to test the continuity and resistance of the wiring and connectors associated with the IMRC system.
5. Check the vacuum system: Verify that the vacuum lines are connected correctly and there are no leaks.

Common Solutions for Trouble Code 00668

Based on the diagnosis, common solutions for the 00668 code include:

• Cleaning the intake manifold runner control valve: Carbon buildup can hinder valve operation. Cleaning it with a specialized cleaner can sometimes resolve the issue.
• Replacing the intake manifold runner control valve: If cleaning doesn’t resolve the issue, the valve itself may need replacement.
• Repairing or replacing damaged wiring or connectors: Faulty wiring or connectors can disrupt the communication between the ECU and the IMRC system.
• Addressing vacuum leaks: Repairing any leaks in the vacuum system can restore proper IMRC operation.

“Regular maintenance of your Audi A3’s intake system can prevent many of these issues,” advises Jake Thompson, a seasoned automotive technician with over 20 years of experience.

What if the Code Returns After Repair?

If the 00668 code returns after repairs, it’s important to re-evaluate the diagnosis. Double-check all connections, wiring, and vacuum lines. A more in-depth inspection of the ECU may be necessary in rare cases.

Can I Drive My Car with Trouble Code 00668?

While it might be possible to drive with this code, it’s not recommended. Driving with a malfunctioning IMRC system can lead to decreased performance, reduced fuel efficiency, and potential damage to other engine components.

“Addressing this issue promptly ensures optimal engine performance and prevents potential further damage,” adds Thompson.

Conclusion

The Audi A3 trouble code 00668 can seem daunting, but with the right approach, you can diagnose and fix the problem. Remember to address this issue promptly to ensure your A3 continues to perform at its best. For further assistance or to schedule an appointment, please contact us at +1 (641) 206-8880 and our email address: vcdstool@gmail.com or visit our office at 6719 W 70th Ave, Arvada, CO 80003, USA. You can also find more information at vcdstool.com.

FAQ

1. What is the intake manifold runner control system? It optimizes air intake for different engine speeds and loads.
2. Can I fix code 00668 myself? Yes, if you have mechanical skills and diagnostic tools.
3. How much does it cost to fix code 00668? The cost varies depending on the specific repair needed.
4. Is code 00668 serious? While not immediately critical, it should be addressed promptly.
5. Can other codes accompany 00668? Yes, other codes related to the intake system may be present.
6. How can I prevent code 00668 in the future? Regular maintenance and cleaning of the intake system can help prevent this issue.
7. What tools do I need to diagnose code 00668? An OBD-II scanner and a multimeter are essential.