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 MANUALSAUDI2001A6 AVANT QUATTROREPAIR AND DIAGNOSISENGINE PERFORMANCESYSTEMON BOARD DIAGNOSTIC (OBD) - 2.8L V6 ATQON BOARD DIAGNOSTIC (OBD)CHECK DTC MEMORY (FUNCTION 02) AND ERASE DTC MEMORY (FUNCTION 05)NOTES

2001 Audi A6 Avant Quattro

Check DTC Memory (function 02) and Erase DTC Memory (function 05): Notes

2001 Audi A6 Avant QuattroSECTION Notes

Connect VAS5051 tester or VAG1551 scan tool and select control module for engine electronics using "address word" 01 VAS 5051 VEHICLE DIAGNOSTIC, TESTING AND INFORMATION SYSTEM ORVAG1551 SCAN TOOL (ST), CONNECTING AND SELECTING FUNCTIONS .

Engine must run at idle for this.

NOTE: If engine doesn't start, crank engine using starter for at least 5 seconds. Do not switch ignition off afterward under any circumstance.

When indicated on display:

Fig 1: Identifying VAG1551 Scan Tool Display - Check DTC Memory And Erase DTC Memory (1 Of 8)

Press buttons -0- and -2- to select "Check DTC memory" and press - Q- button to confirm input.

When indicated on display:

Fig 2: Identifying VAG1551 Scan Tool Display - Check DTC Memory And Erase DTC Memory (2 Of 8)

Press right arrow button.

When indicated on display:

Fig 3: Identifying VAG1551 Scan Tool Display - Check DTC Memory And Erase DTC Memory (3 Of 8)

When printer is switched on, stored DTCs are shown in sequence and printed.

Find printed DTCs in DTC table and repair. See DIAGNOSTIC TROUBLE CODE (DTC) TABLE .

NOTE:

If there are no DTCs in DTC memory, DTC memory should not be unnecessarily erased or else readiness code will be lost.
If DTC memory was erased, readiness code must be re - generated. See READINESS CODE, GENERATING .

Press --> button.

When indicated on display:

Fig 4: Identifying VAG1551 Scan Tool Display - Check DTC Memory And Erase DTC Memory (4 Of 8)

Press buttons -0- and -5- to select "Erase DTC memory" and press - Q- button to confirm input.

NOTE: When indicated on display:

RENDER: 1.0x

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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.