Diagnostic Mode 08: Tank leak test
WARNING: This page is about a different car, the 2006 Audi A4, 2005 Audi A4, 2004 Audi A4, 2003 Audi A4, and 2002 Audi A4. However, it is still accessible from the selected car via links, so may be relevant.
Diagnostic Mode 08 is used to test the fuel system for leaks.
NOTE:
- Depending on scan tool and protocol used, diagnostic mode 08 and the information provided may be referred to by a different name.
NOTE:
- If the accelerator pedal is depressed during the test, the test will be aborted.
Test requirements
- No DTCs stored in the DTC memory.
- Intake Air Temperature (IAT) maximum 60°C.
- Coolant temperature 80 -110°C.
- Throttle valve angle 12.0 - 16.0%.
Procedure
- Connect the scan tool.
- Start the engine and run at idle for at least 15 minutes.
- Select "Mode 8: Tank Leak Test".
- Select "OBDMID 01: Tank Leak Test".
- Check the specified value of the tank leak test at idle.
- The following will be displayed on the scan tool screen:
| Tank leak test | Specified value | |||||
|---|---|---|---|---|---|---|
|
Test OK | |||||
- Switch the ignition off.
If the specified value is obtained:
- Refer to "Diagnostic mode 03: Interrogating fault memory " to check for any DTCs that may be stored → Mode 03: Interrogating fault memory .
- To repeat the tank test, switch the ignition off and start the engine again and let run for 15 minutes at idle.
- Switch the ignition off.
- End of diagnosis.