The dreaded “Check Engine” light can be a source of anxiety for any Audi TT owner. One particularly common and frustrating fault code is 17705. This article will delve into the causes, symptoms, diagnostic procedures, and solutions for the audi tt fault code 17705, empowering you to understand and address this issue effectively.

Similar to other issues you might find detailed on resources like the 17705 fault code audi, understanding this specific fault code can save you time and money. This guide provides a comprehensive overview to help you navigate the troubleshooting process, whether you’re a seasoned mechanic or a concerned car owner. We’ll cover everything from basic checks to more advanced diagnostic techniques.

What is Audi TT Fault Code 17705?

Fault code 17705 in an Audi TT typically points to a “Pressure Drop between Turbo and Throttle Valve (check D.V.!).” This essentially means there’s a leak in the pressurized air system between the turbocharger and the throttle body. This leak disrupts the precise air-fuel mixture required for optimal engine performance, leading to a range of drivability issues.

Audi TT Fault Code 17705: Turbo and Throttle Valve Diagram

Common Symptoms of Fault Code 17705

What does fault code 17705 mean for your Audi TT’s performance? You might experience several noticeable symptoms, including:

• Reduced power and acceleration, often described as a “loss of boost.”
• Hesitation or stumbling during acceleration.
• Unusual hissing or whistling sounds from the engine bay.
• Poor fuel economy.
• The illumination of the “Check Engine” light.

Diagnosing Fault Code 17705

How do you pinpoint the exact cause of the 17705 fault code? Begin with these simple checks:

1. Visually inspect all hoses and connections: Look for cracks, splits, or loose clamps in the intake system, paying close attention to the hoses connected to the turbocharger, intercooler, and throttle body.
2. Check the Diverter Valve (DV): The DV is a common culprit in this scenario. Inspect it for tears or damage. You can also test its functionality by applying pressure to the vacuum hose. A properly functioning DV should hold pressure.

If these initial checks don’t reveal the problem, further diagnostics might be necessary:

• Pressure Testing: A pressure test of the intake system can pinpoint leaks more accurately. This involves pressurizing the system and listening for escaping air.
• Scanning for Other Codes: Additional fault codes may be present, providing further clues to the underlying issue.

This is very similar to the troubleshooting steps you would take for other turbo-related issues, as explained on resources like the 17705 fault code audi. By methodically checking each component, you can efficiently isolate the problem area.

Fixing Audi TT Fault Code 17705

Once you’ve identified the source of the leak, the repair process is usually straightforward:

• Replace damaged hoses or clamps: If you find any cracks or loose clamps, replace the affected components with high-quality parts.
• Replace the Diverter Valve (DV): If the DV is faulty, replacing it is often the most effective solution.
• Repair or replace the intercooler: In rare cases, a damaged intercooler may be the cause of the leak.

Preventing Future Occurrences of 17705

Regular maintenance can help prevent the recurrence of this fault code. Consider the following:

• Regularly inspect hoses and connections: Visual inspections can catch potential problems early.
• Replace hoses and clamps proactively: Hoses and clamps can degrade over time, so consider replacing them preventatively, especially in older vehicles.

Audi TT Hose and Clamp Replacement

Expert Insights

“The 17705 code often stems from overlooked maintenance,” says David Miller, a seasoned Audi technician with over 20 years of experience. “Regular checks of the intake system can prevent costly repairs down the line.”

Another expert, Sarah Johnson, specializing in European car diagnostics, adds, “Don’t underestimate the importance of quality parts. Using inferior replacements can lead to recurring leaks and further complications.”

Conclusion

The Audi TT fault code 17705, while potentially frustrating, is usually a manageable issue. By following the diagnostic and repair procedures outlined in this guide, you can effectively address this problem and restore your Audi TT to its optimal performance. As mentioned in several resources, such as the 17705 fault code audi, understanding the root cause is crucial for a long-term solution. If you need assistance, feel free to contact us at VCDSTool 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.

FAQ

1. Can I drive my Audi TT with the 17705 fault code? While you might be able to drive, it’s recommended to address the issue promptly to avoid potential damage and further complications.
2. How much does it cost to fix the 17705 fault code? The cost varies depending on the specific cause and the labor rates in your area.
3. Is the 17705 fault code serious? While not immediately catastrophic, ignoring the issue can lead to more significant problems down the line.
4. Can I fix the 17705 fault code myself? Basic checks and repairs can be done by DIYers, but more complex diagnostics and repairs might require professional assistance.
5. What tools do I need to diagnose the 17705 fault code? Basic tools include a socket set, screwdrivers, and a pressure tester (if performing a pressure test).
6. How can I prevent the 17705 fault code from recurring? Regular inspections and preventative maintenance are key.
7. Where can I find more information about Audi TT fault codes? Resources like VCDSTool offer valuable information and support.