Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSAUDI1998A8 SEDAN (4D2) V8-3.7L (AEW)REPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSTESTING AND INSPECTIONSCAN TOOL TESTING AND PROCEDURES5 SPEED AUTOMATIC 01V FWDSELECTABLE FUNCTIONS (MODES) UNDER ADDRESS WORD 33, CARB/OBD II
1998 Audi A8 Sedan (4D2) V8-3.7L (AEW)
Selectable Functions (Modes) Under Address Word 33, CARB/OBD II
1998 Audi A8 Sedan (4D2) V8-3.7L (AEW)SECTION Selectable Functions (Modes) Under Address Word 33, CARB/OBD II
On Board Diagnostic (OBD II), Functions
NOTE: The following modes can be selected by inserting address word 33:
Mode Function
1 Transmit diagnostic data:
- Only certain individual test values can be read. In the workshop, the measuring value block is read only with address word 02, function 08.
2 Not applicable
3 Check DTC memory:
- Only emissions influencing malfunctions are indicated immediately (depending on the malfunction), or after two driving cycles (Dcy) via the corresponding P-codes. In the workshop DTC memory is checked with address word 02, function 02.
4 Erase DTC memory:
- DTC memory can be erased even if it has not previously been read. In the workshop DTC memory is erased with address word 02, function 05.
5 Not applicable
6 Not applicable
7 OBD test results, continuously monitored:
- Emissions-related malfunctions can be read, even if these malfunctions have not existed long enough for the MIL to be switched on.
NOTE: This On Board Diagnostic function information does not go into detail.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.