Engine Stalling Issue in Audi A6 C8 (2018-2024)

Repair Instructions

Tools Required

• OBD-II Scanner
• Multimeter
• Fuel Pressure Gauge
• Basic Hand Tools (Screwdrivers, Wrenches)
• Throttle Body Cleaner
• Safety Gear (Gloves, Eye Protection)

Step-by-Step Repair

1. Retrieve and Address OBD-II Codes:

   • Plug in the OBD-II scanner and retrieve codes. Address the specific issues indicated by the codes, such as replacing faulty sensors.

2. Fuel System Repair:

   • If low fuel pressure is detected, inspect and replace the fuel pump or filter as needed.
   • Test and replace the fuel pump relay if it's not engaging properly.

3. Air Intake System Maintenance:

   • Remove and clean the MAF sensor with a specified MAF cleaner.
   • Replace the air filter if dirty or clogged.

4. Ignition System Check:

   • Replace spark plugs if they show signs of wear or damage.
   • Test and replace faulty ignition coils.
   • Replace the crankshaft position sensor if out of specification.

5. Throttle Body and IAC Valve:

   • Remove the throttle body and clean it thoroughly using throttle body cleaner.
   • Reinstall and perform a throttle body relearn procedure if required.
   • Clean or replace the IAC valve as necessary.

6. Electrical System Check:

   • Test the battery voltage and recharge or replace if necessary.
   • Test the alternator output and replace if it is not within specifications.

Final Testing

• After performing the repairs, clear any fault codes using the OBD-II scanner.
• Conduct a test drive to ensure the issue has been resolved.
• Monitor the vehicle for any recurring symptoms or new fault codes.

By following these detailed steps, you should be able to diagnose and repair the engine stalling issue in the Audi A6 C8 effectively. If the problem persists after these steps, consider consulting with a certified Audi technician for further diagnosis.