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), GENERIC SCAN TOOL - 2.8L V6 AHA, ATQ
2001 Audi A6 Avant Quattro
On Board Diagnostic (OBD), Generic Scan Tool - 2.8L V6 Aha, ATQ
2001 Audi A6 Avant QuattroSECTION On Board Diagnostic (OBD), Generic Scan Tool - 2.8L V6 Aha, ATQ
- On Board Diagnostic
- On Board Diagnostic (OBD), general information
- On Board Diagnostic (OBD), characteristics
- On Board Diagnostic (OBD), technical data
- Diagnostic tester, connecting
- Test box, connecting for wiring test
- Malfunction Indicator Lamp (MIL) in instrument cluster, checking
- Diagnostic function, selecting
- Recommended special tools and equipment e.g.:
- Address word 33 - On Board Diagnostic (OBD)
- Diagnostic mode 1: Check measuring values
- Diagnostic mode 2: Checking operating conditions
- Diagnostic mode 3: Check DTC Memory
- Diagnostic mode 4: Reset/erase diagnostic data
- Diagnostic mode 5: Check output of oxygen sensor signals
- Function
- Requirements
- Procedure
- Output of oxygen sensor signals
- Evaluation test-ID 01: Rich to lean sensor barrier voltage
- Evaluation test-ID 02: Lean to rich sensor barrier voltage
- Evaluation test-ID 07: Minimum voltage at sensor for test cycle
- Evaluation test-ID 08: Maximum voltage at sensor for test cycle
- Evaluation test-ID 09: Time period between sensor shift procedures
- Diagnostic mode 6: Check test results of components that are not continuously monitored
- Diagnostic mode 7: Check test results of components that are continuously monitored
- Diagnostic mode 8: Tank leak test
- Diagnostic mode 9: Vehicle information
- Readiness code
- Diagnostic Trouble Code (DTC) tables:
- On Board Diagnostic (OBD), general information
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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.