Repair and Diagnosis

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• Quick Lookups
  • Common Specs & Procedures
  • DTC Index
    • DTC Index (Thru U0080)
    • DTC Index (Thru U0093)
    • DTC Index (Thru U0415)
  • Electrical Component Locations
    • A8 QUATTRO - Component Locations
  • Fluids
  • Technical Bulletins
    • Safety Recalls
    • Technical Service Bulletins
  • Tire Fitment
  • Wiring Diagrams
    • System Wiring Diagrams
    • Using lemon2025'S System Wiring Diagrams
    • Wires
    • Wiring
    • Wiring Diagram - CWWB
    • Wiring Diagram - CZSE
    • Wiring Diagram - CZSE,CZSA
• Accessories & Equipment
  • Accessories Control Systems
    • General, Technical Data Electrical Equipment
  • Anti-Theft Systems
    • Front Doors, Central Locking System
    • Interior Lights, Lamps And Switches
    • Interior Lights, Switches
  • Collision/Avoidance
    • Driver Assistance Systems
    • General, Technical Data Driver Assistance Systems
  • Communication Devices
    • General, Technical Data Communication
    • General, Technical Data Electrical Equipment
  • Drivers Assistance Systems - ADAS
    • Driver Assistance Systems
    • General, Technical Data Driver Assistance Systems
    • General, Technical Data Electrical Equipment
  • Entertainment Systems
    • Communication
    • Communication - Radio Installation Instructions
    • General, Technical Data Electrical Equipment
  • Exterior Lights
    • Exterior Lights, Lamps And Switches
    • Exterior Lights, Switches
    • General, Technical Data Body Exterior
  • Gauges & Instrument Panels
    • General, Technical Data Body Interior
    • General, Technical Data Oil Gauge Tester T40178 Service Values
    • Instruments
    • Interior Equipment
  • Infotainment
    • Communication
    • Communication - Radio Installation Instructions
    • General, Technical Data Electrical Equipment
  • Interior/Exterior Trim
    • Body Interior (Camper Cabinets, Shelves, Water Tank)
    • Exterior Equipment
    • General, Technical Data Body Exterior
    • General, Technical Data Body Interior
    • Interior Equipment
    • Interior Trim
  • Mirrors
    • Exterior Equipment
    • General, Technical Data Body Interior
    • Interior Equipment
  • Seats
    • General, Technical Data Body Interior
    • Seat Frames
    • Seat Upholstery, Covers
  • Warning Systems
    • Driver Assistance Systems
    • General, Technical Data Driver Assistance Systems
  • Window Motors & Regulators
    • Front Doors, Central Locking System
    • General, Technical Data Body Interior
    • Glass, Window Regulators
    • Rear Doors
  • Wiper/Washer Systems
    • Windshield Washer System
    • Wiper/Washer Systems
• Body & Frame
  • Door Locks
    • Front Doors, Central Locking System
    • Interior Lights, Lamps And Switches
    • Interior Lights, Switches
  • Exterior Body Panels
    • Body Front
    • Bumpers
    • Exterior Equipment
    • Front Doors, Central Locking System
    • General, Technical Data Body Exterior
    • Hood, Lids
    • Rear Doors
  • Exterior/Interior Trim
    • Body Interior (Camper Cabinets, Shelves, Water Tank)
    • Exterior Equipment
    • General, Technical Data Body Exterior
    • General, Technical Data Body Interior
    • Interior Equipment
    • Interior Trim
  • Mirrors
    • Exterior Equipment
    • General, Technical Data Body Interior
    • Interior Equipment
  • Seats
    • General, Technical Data Body Interior
    • Seat Frames
    • Seat Upholstery, Covers
  • Sun Roof/T-Top/Convertible Top
    • Sunroof
  • Windows
    • Front Doors, Central Locking System
    • General, Technical Data Body Interior
    • Glass, Window Regulators
    • Rear Doors
• Brakes
  • Anti-Lock Brakes
    • Antilock Brake System
    • General, Technical Data Brake System
  • Brakes Control Systems
    • General, Technical Data Brake System
  • Mechanical - Hydraulic
    • General, Technical Data Brake System
    • Hydraulic Components (Brakes)
    • Mechanical Components (Brakes)
  • Parking Brake System
    • General, Technical Data Brake System
    • Mechanical Components (Brakes)
  • Traction Control
    • Antilock Brake System
    • General, Technical Data Brake System
• Drivelines & Axles
  • Axle Shafts
    • Final Drive, Differential 8-Speed Automatic Transmission 0D5
    • Final Drive, Differential Rear Final Drive 0D2, 0D3, 0DB, 0B0, 0BX, 0DG, 0G2, 09R
    • Final Drive, Differential Servicing 8-Speed Automatic Transmission
    • General, Technical Data Rear Final Drive 0D2, 0D3, 0DB, 0B0, 0BX, 0DG, 0G2, 09R
  • Differentials & Drive Axles
    • Final Drive, Differential 8-Speed Automatic Transmission 0D5
    • Final Drive, Differential Rear Final Drive 0D2, 0D3, 0DB, 0B0, 0BX, 0DG, 0G2, 09R
    • Final Drive, Differential Servicing 8-Speed Automatic Transmission
    • General, Technical Data Rear Final Drive 0D2, 0D3, 0DB, 0B0, 0BX, 0DG, 0G2, 09R
  • Driveshaft & Universal Joints
    • General, Technical Data Rear Final Drive 0D2, 0D3, 0DB, 0B0, 0BX, 0DG, 0G2, 09R
• Electrical
  • Body Electrical
    • General, Technical Data Electrical Equipment
    • Wires
    • Wiring
  • Charging Systems
    • Battery And Generator
    • Charging System (Battery, Starter, Generator) & Cruise Control
    • General, Technical Data Electrical Equipment
  • A8 QUATTRO - Component Locations
  • Fuses & Circuit Breakers
    • General, Technical Data Electrical Equipment
    • Wires
    • Wiring
  • Gauges
    • General, Technical Data Body Interior
    • General, Technical Data Oil Gauge Tester T40178 Service Values
    • Instruments
    • Interior Equipment
  • Motors, Switches, Relays
    • General, Technical Data Electrical Equipment
    • Wires
    • Wiring
  • Wiring Diagrams
    • System Wiring Diagrams
    • Using lemon2025'S System Wiring Diagrams
    • Wires
    • Wiring
    • Wiring Diagram - CWWB
    • Wiring Diagram - CZSE
    • Wiring Diagram - CZSE,CZSA
• Engine Mechanical
  • Blowers, Superchargers & Turbochargers
    • Turbocharger, Supercharger - Servicing - 6-Cylinder 2.9L; 3.0L 4V TFSI Ea839 Engine
    • Turbocharger, Supercharger 6-Cylinder Direct Injection 3.0L 4V TFSI Engine Ea839
  • Cooling System (Mechanical)
    • Cooling System 6-Cylinder Direct Injection 3.0L 4V TFSI Engine Ea839
    • Cooling System Servicing - 6-Cylinder 2.9L; 3.0L 4V TFSI Ea839
    • General, Technical Data Servicing - 6-Cylinder 2.9L; 3.0L 4V TFSI Ea839 Engine
  • Exhaust
    • Exhaust System, Emission Controls 6-Cylinder Direct Injection 3.0L 4V TFSI Engine Ea839
    • Exhaust System, Emission Controls Servicing - 6-Cylinder 2.9L; 3.0L 4V TFSI Ea839 Engine
    • General Information - Maintenance
    • General, Technical Data Communication
    • General, Technical Data High-Voltage Vehicle General Information
    • General, Technical Data Seats
    • General, Technical Data Servicing - 6-Cylinder 2.9L; 3.0L 4V TFSI Ea839 Engine
    • Wiring Diagram - CWWB
    • Wiring Diagram - CZSE
    • Wiring Diagram - CZSE,CZSA
  • Fuel System
    • Fuel Supply
    • General, Technical Data Fuel Supply System
    • General, Technical Data Servicing - 6-Cylinder 2.9L; 3.0L 4V TFSI Ea839 Engine
    • MULTIPORT Fuel Injection - 6-Cylinder Direct Injection 3.0L 4V TFSI Engine Ea839
    • MULTIPORT Fuel Injection - Servicing - 6-Cylinder 2.9L; 3.0L 4V TFSI Ea839 Engine
  • Lubrication System
    • General, Technical Data Oil Gauge Tester T40178 Service Values
    • General, Technical Data Servicing - 6-Cylinder 2.9L; 3.0L 4V TFSI Ea839 Engine
    • Lubrication 6-Cylinder Direct Injection 3.0L 4V TFSI Engine Ea839
    • Lubrication Servicing - 6-Cylinder 2.9L; 3.0L 4V TFSI Ea839 Engine
  • Mechanical
    • Crankshaft, Cylinder Block 6-Cylinder 2.9L; 3.0L 4V TFSI Ea839 Engine
    • Crankshaft, Cylinder Block 6-Cylinder Direct Injection 3.0L 4V TFSI Engine Ea839
    • Crankshaft, Cylinder Block Servicing - 8-Cylinder 4.0L 4V TFSI Engine Ea825
    • Cylinder Head, VALVETRAIN 6-Cylinder Direct Injection 3.0L 4V TFSI Engine Ea839
    • Cylinder Head, VALVETRAIN Servicing - 6-Cylinder 2.9L; 3.0L 4V TFSI Ea839 Engine
    • Engine Assembly 6-Cylinder Direct Injection 3.0L 4V TFSI Engine
    • Engine Assembly Servicing - 6-Cylinder 2.9L; 3.0L 4V TFSI Ea839
    • General Information - Maintenance
    • General, Technical Data 6-Cylinder Direct Injection 3.0L 4V TFSI Engine Ea839
    • General, Technical Data Communication
    • General, Technical Data Fuel Supply System
    • General, Technical Data High-Voltage Vehicle General Information
    • General, Technical Data Oil Gauge Tester T40178 Service Values
    • General, Technical Data Seats
    • General, Technical Data Servicing - 6-Cylinder 2.9L; 3.0L 4V TFSI Ea839 Engine
    • Wiring Diagram - CWWB
    • Wiring Diagram - CZSE
    • Wiring Diagram - CZSE,CZSA
• Engine Performance
  • Emissions
    • Emission Applications
    • Emission Control Abbreviations
    • State Emission Standards - Diesel
    • State Emission Standards - Gas
  • Engine Control Systems
    • General, Technical Data Fuel Supply System
    • Generic Scan Tool - CWGD,DECA,DCBD,CZSE,DLZA,DKMB (Description & Operation)
    • Generic Scan Tool (CWGD,DECA,DCBD,CZSE,DLZA,DKMB) - Engine DTC Tables (P0420 - P2243)
    • Generic Scan Tool (CWGD,DECA,DCBD,CZSE,DLZA,DKMB) - Engine DTC Tables (P2237 - U0093)
    • Generic Scan Tool (CWGD,DECA,DCBD,CZSE,DLZA,DKMB) - Transmission DTC Tables
    • Generic Scan Tool CWGD,DECA,CZSE,DCBD,DWNB,DWLA,DWPA,DWKA,DWRP,DLZA,DKMB - Engine DTC Tables (P0420 - P0447)
    • Generic Scan Tool CWGD,DECA,CZSE,DCBD,DWNB,DWLA,DWPA,DWKA,DWRP,DLZA,DKMB - Engine DTC Tables (P043E - P0652) & Transmission DTC Tables
    • Generic Scan Tool CWGD,DECA,CZSE,DCBD,DWNB,DWLA,DWPA,DWKA,DWRP,DLZA,DKMB (General Information)
  • Fuel Delivery
    • Fuel Supply
    • General, Technical Data Fuel Supply System
    • General, Technical Data Servicing - 6-Cylinder 2.9L; 3.0L 4V TFSI Ea839 Engine
    • MULTIPORT Fuel Injection - 6-Cylinder Direct Injection 3.0L 4V TFSI Engine Ea839
    • MULTIPORT Fuel Injection - Servicing - 6-Cylinder 2.9L; 3.0L 4V TFSI Ea839 Engine
  • Ignition System
    • General, Technical Data Servicing - 6-Cylinder 2.9L; 3.0L 4V TFSI Ea839 Engine
    • Ignition/Glow Plug System 6-Cylinder Direct Injection 3.0L 4V TFSI Engine Ea839
    • Ignition/Glow Plug System Servicing 6-Cylinder 2.9L; 3.0L 4V TFSI Ea839
  • Specifications
    • Firing Order & Cylinder Identification
  • System
    • Generic Scan Tool - CWGD,DECA,DCBD,CZSE,DLZA,DKMB (Description & Operation)
    • Generic Scan Tool (CWGD,DECA,DCBD,CZSE,DLZA,DKMB) - Engine DTC Tables (P0420 - P2243)
    • Generic Scan Tool (CWGD,DECA,DCBD,CZSE,DLZA,DKMB) - Engine DTC Tables (P2237 - U0093)
    • Generic Scan Tool (CWGD,DECA,DCBD,CZSE,DLZA,DKMB) - Transmission DTC Tables
    • Generic Scan Tool CWGD,DECA,CZSE,DCBD,DWNB,DWLA,DWPA,DWKA,DWRP,DLZA,DKMB - Engine DTC Tables (P0420 - P0447)
    • Generic Scan Tool CWGD,DECA,CZSE,DCBD,DWNB,DWLA,DWPA,DWKA,DWRP,DLZA,DKMB - Engine DTC Tables (P043E - P0652) & Transmission DTC Tables
    • Generic Scan Tool CWGD,DECA,CZSE,DCBD,DWNB,DWLA,DWPA,DWKA,DWRP,DLZA,DKMB (General Information)
  • Testing & Diagnosis
    • Generic Scan Tool - CWGD,DECA,DCBD,CZSE,DLZA,DKMB (Description & Operation)
    • Generic Scan Tool (CWGD,DECA,DCBD,CZSE,DLZA,DKMB) - Engine DTC Tables (P0420 - P2243)
    • Generic Scan Tool (CWGD,DECA,DCBD,CZSE,DLZA,DKMB) - Engine DTC Tables (P2237 - U0093)
    • Generic Scan Tool (CWGD,DECA,DCBD,CZSE,DLZA,DKMB) - Transmission DTC Tables
    • Generic Scan Tool CWGD,DECA,CZSE,DCBD,DWNB,DWLA,DWPA,DWKA,DWRP,DLZA,DKMB - Engine DTC Tables (P0420 - P0447)
    • Generic Scan Tool CWGD,DECA,CZSE,DCBD,DWNB,DWLA,DWPA,DWKA,DWRP,DLZA,DKMB - Engine DTC Tables (P043E - P0652) & Transmission DTC Tables
    • Generic Scan Tool CWGD,DECA,CZSE,DCBD,DWNB,DWLA,DWPA,DWKA,DWRP,DLZA,DKMB (General Information)
  • Tune-Up
    • General, Technical Data Servicing - 6-Cylinder 2.9L; 3.0L 4V TFSI Ea839 Engine
    • Ignition/Glow Plug System 6-Cylinder Direct Injection 3.0L 4V TFSI Engine Ea839
    • Ignition/Glow Plug System Servicing 6-Cylinder 2.9L; 3.0L 4V TFSI Ea839
• General Information
  • Abbreviations
    • Commonly Used Abbreviations - General Information
    • Emission Control Abbreviations
  • Basic Trouble Shooting
    • Basic Trouble Shooting - General Information
    • Commonly Used Abbreviations - General Information
    • Emission Control Abbreviations
    • Engine Performance - Trouble Shooting - General Information
  • Brakes
    • Anti-Lock Brake Safety Precautions - General Information
    • Map - Brake Systems
    • Map - Routine Inspection Reference Guide
  • Check Lists
    • Symptom Check List Worksheet - General Information
  • Driveline/Axles
    • Drive Axle Noise Diagnosis - General Information
    • Gear Tooth Contact Patterns - General Information
    • Map - Drive Train & Transmission
    • Trouble Shooting - Clutches - General Information
  • DTC Index
    • DTC Index (Thru U0080)
    • DTC Index (Thru U0093)
    • DTC Index (Thru U0415)
  • Electrical
    • Map - Electrical Systems
    • Using lemon2025'S System Wiring Diagrams
  • Engine
    • Engine Overhaul Procedures - General Information
    • General Cooling System Service - General Information
  • Engine Performance
    • Electrostatic Discharge Warning - General Information
    • Engine Performance Diagnostic Routine Outline - General Information
    • Engine Performance Safety Precautions
    • Map - Engine Performance & Maintenance
    • Parasitic Load Explanation & Test Procedures - General Information
    • State Emission Standards - Diesel
    • State Emission Standards - Gas
    • Waveforms - Injector Pattern Tutorial - General Information
  • Map - Exhaust Systems
  • Heating, Ventilation & A/C (HVAC)
    • Map - Heating, Ventilation, & Air Conditioning
  • Identification
    • CANADIAN Model Cross-Reference
  • Metric Conversions
    • Engine Displacement Conversion Table - ECAT
    • Metric Conversions
  • Maintenance Reminder Light (Reset Procedures)
  • Specifications Index
    • Common Specs & Procedures
  • Steering
    • Map - Steering, Suspension, Wheel Alignment, Wheels & Tires
    • Wheel Alignment Theory & Operation - General Information
  • Traction Control Disable Procedures
  • Trouble Shooting - Manual Transmission - General Information
• Heating, Ventilation & A/C (HVAC)
  • General Servicing
    • General, Technical Data Heating, Ventilation And Air Conditioning
    • General, Technical Data Refrigerant R1234YF Servicing
  • HVAC Control Systems
    • Air Conditioning Heating, Ventilation And Air Conditioning (Front & Rear HVAC Unit)
    • Air Conditioning Heating, Ventilation And Air Conditioning (Refrigerant Circuit)
    • Air Conditioning Refrigerant R1234YF Servicing (Refrigerant Circuit)
    • Air Conditioning Refrigerant R1234YF Servicing (Tools & Testing Equipment)
    • Air Conditioning Refrigerant R134A Servicing (General Information)
    • Air Conditioning Refrigerant R134A Servicing (Refrigerant Circuit)
    • Air Conditioning Refrigerant R134A Servicing (Refrigerant Components)
    • General, Technical Data Heating, Ventilation And Air Conditioning
    • General, Technical Data Refrigerant R1234YF Servicing
    • Heating, Ventilation
• Hybrid/Electric Powertrain
  • Battery Management Systems
    • Electric Drive
    • General Information - Maintenance
    • General, Technical Data High-Voltage Vehicle General Information
    • General, Technical Data Seats
  • Electric Converters and Controllers
    • Electric Drive
  • Electric Motor Systems
    • Electric Drive
  • Testing and Diagnosis
    • Electric Drive
• Maintenance
  • Procedures
    • 2022 AUDI Service
    • Genuine Oils For Warranty
    • Maintenance Reminder Light (Reset Procedures)
    • Maintenance, Diagnosis
• Restraints
  • Air Bag, SRS
    • Passenger Protection, Airbags, Seat Belts
  • Passive Restraints
    • Passenger Protection, Airbags, Seat Belts
• Steering
  • Manual Steering
    • General, Technical Data Suspension, Wheels, Steering
  • Power Steering
    • General, Technical Data Suspension, Wheels, Steering
  • Steering Column
  • Steering Control Systems
    • General, Technical Data Suspension, Wheels, Steering
  • Steering Gear
    • General, Technical Data Suspension, Wheels, Steering
    • Steering
  • Steering Linkage
    • General, Technical Data Suspension, Wheels, Steering
    • Steering
• Suspension
  • Electronic Suspension
    • Self-Leveling Suspension
  • Front Suspension
    • Front Suspension
    • General, Technical Data Suspension, Wheels, Steering
  • Rear Suspension
    • General, Technical Data Suspension, Wheels, Steering
    • Rear Suspension
  • Wheel Alignment
    • AUDI Wheel Alignment Specifications - A8
    • General, Technical Data Suspension, Wheels, Steering
    • Wheels, Tires, Wheel Alignment - Suspension, Wheels, Steering
    • Wheels, Tires, Wheel Alignment - Wheel And Tire Guide
    • Wheels, Tires, Wheel Alignment - Wheel And Tire Guide General Information
  • Wheels & Tire System
    • General, Technical Data Suspension, Wheels, Steering
• Transmission
  • Automatic Trans
    • Gears, Hydraulic Controls 8-Speed Automatic Transmission 0D5
    • Gears, Hydraulic Controls Servicing - 8-Speed Automatic Transmission
    • General, Technical Data 8-Speed Automatic Transmission 0D5
    • General, Technical Data Servicing - 8-Speed Automatic Transmission
    • Torque Converter 8-Speed Automatic Transmission 0D5
    • Torque Converter Servicing - 8-Speed Automatic Transmission
  • Clutch
    • General, Technical Data 8-Speed Automatic Transmission 0D5
  • Manual Trans
    • General, Technical Data 8-Speed Automatic Transmission 0D5
  • Transfer Case
    • General, Technical Data 8-Speed Automatic Transmission 0D5
  • Transmission Control Systems
    • Controls, Housing 8-Speed Automatic Transmission 0D5
    • Gears, Hydraulic Controls 8-Speed Automatic Transmission 0D5
    • Gears, Hydraulic Controls Servicing - 8-Speed Automatic Transmission
    • General, Technical Data 8-Speed Automatic Transmission 0D5
    • General, Technical Data Servicing - 8-Speed Automatic Transmission
• External Pages