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 MANUALSAUDI1999A6 BASEREPAIR AND DIAGNOSIS (SINGLE PAGE)ACCESSORIES & EQUIPMENTCRUISE CONTROL SYSTEMSON BOARD DIAGNOSTIC (OBD) - UP TO 2000AUTOMATIC VERTICAL HEADLIGHT AIM CONTROL (M.Y. 2000 >), ON BOARD DIAGNOSTIC (OBD)DIAGNOSTIC TROUBLE CODE (DTC) TABLE
1999 Audi A6 Base
Diagnostic Trouble Code (DTC) table
1999 Audi A6 BaseSECTION Diagnostic Trouble Code (DTC) table
- The following table lists all malfunctions that can be recognized by automatic vertical headlight aim control and printed out by the VAG1551 scan tool. The malfunctions are listed in order according to their 5-digit numbers.
- DTC numbers appear only on the print-out.
- Before replacing a component shown as faulty, check the wiring and connections to the component as well as the Ground (GND) connections according to wiring diagram.
- After repairs and function test of the system, DTC memory must always be checked again using the VAG1551 scan tool and erased.
- DTC memory records all static and sporadic malfunctions: A malfunction is recognized as being static if it occurs for at least 2 seconds. If the malfunction is no longer recognized after that it is stored as sporadic malfunction. 7SP" will appear at right on scan tool display.
- When the ignition is switched on, all existing malfunctions are automatically re-classified as sporadic malfunctions and will only register as static malfunctions if they still occur after testing.
- Sporadic malfunctions which no longer occur during 50 driving cycles (ignition on at least 5 minutes, vehicle speed 30 km/h) are erased automatically.
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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.