Repair and Diagnosis

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• Quick Lookups
  • Common Specs & Procedures
    • Common Specifications & Procedures
    • General, Technical Data (8-Cylinder Direct Injection 4.0L 4V TFSI Engine Ea825)
    • General, Technical Data (8-Speed Automatic Transmission 0D6)
    • General, Technical Data (Servicing - 8-Cylinder 4.0L 4V TFSI Engine Ea825)
  • Electrical Component Locations
    • Driver Assistance Systems
    • RS Q8 - Component Locations
  • Fluids
  • Technical Bulletins
    • Safety Recalls
    • Technical Service Bulletins
  • Tire Fitment
  • Wiring Diagrams
    • OEM Wiring Diagrams
    • System Wiring Diagrams
    • Using lemon2025'S System Wiring Diagrams
    • Wires
    • Wiring
• Accessories & 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)
    • Wheels, Tires And Wheel Alignment (Suspension, Wheels, Steering)
  • Cruise Control Systems
    • Charging System (Battery, Starter, Generator) & Cruise Control (1 Of 2)
    • Charging System (Battery, Starter, Generator) & Cruise Control (2 Of 2)
    • Driver Assistance Systems
    • General, Technical Data (Driver Assistance Systems)
    • Wheels, Tires And Wheel Alignment (Suspension, Wheels, Steering)
  • Drivers Assistance Systems - ADAS
    • Driver Assistance Systems
    • General, Technical Data (Driver Assistance Systems)
    • Wheels, Tires And Wheel Alignment (Suspension, Wheels, Steering)
  • Entertainment Systems
    • Communication (1 Of 2)
  • Exterior Lights
    • Exterior Lights, Lamps And Switches
    • Exterior Lights, Switches
  • Gauges & Instrument Panels
    • Instruments
  • Infotainment
    • Communication (1 Of 2)
    • Communication (2 Of 2)
  • Interior/Exterior Trim
    • Exterior Equipment
    • Interior Equipment
    • Trim Panels And Insulation
  • Interior/Illumination Lights
    • Interior Lights, Lamps And Switches
    • Interior Lights, Switches
  • Mirrors
    • Exterior Equipment
  • Seats
    • General, Technical Data (Seats)
    • Interior Equipment
    • Seat Frames
    • Seat Upholstery, Covers
  • Warning Systems
    • Communication (1 Of 2)
  • Window Motors & Regulators
    • Exterior Equipment
    • Front Doors, Central Locking System
    • Glass, Window Regulators
    • Rear Doors
  • Wiper/Washer Systems
    • Windshield Washer System
    • Wiper/Washer Systems
  • Wiring System (Data Link Connectors, Pwr Dist., Grnd Dist.)
    • Wires
    • Wiring
• 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
    • Exterior Equipment
    • Interior Equipment
    • Trim Panels And Insulation
  • Mirrors
    • Exterior Equipment
  • Seats
    • General, Technical Data (Seats)
    • Interior Equipment
    • Seat Frames
    • Seat Upholstery, Covers
  • Sun Roof/T-Top/Convertible Top
    • Sunroof
  • Windows
    • Exterior Equipment
    • Front Doors, Central Locking System
    • Glass, Window Regulators
    • Rear Doors
• Brakes
  • Anti-Lock Brakes
    • Antilock Brake System
  • Mechanical - Hydraulic
    • General, Technical Data (Brake System)
    • Hydraulic Components (Brake System)
    • Mechanical Components (Brake System)
  • Parking Brake System
    • General, Technical Data (Brake System)
    • Mechanical Components (Brake System)
  • Traction Control
    • Antilock Brake System
• Drivelines & Axles
  • Axle Shafts
    • Final Drive, Differential (8-Speed Automatic Transmission 0D6)
    • Front Suspension
    • Rear Suspension
  • Differentials & Drive Axles
    • Final Drive, Differential (8-Speed Automatic Transmission 0D6)
• Electrical
  • Body Electrical
    • Driver Assistance Systems
    • General, Technical Data (Electrical System)
    • Wiring
  • Charging Systems
    • Charging System (Battery, Starter, Generator) & Cruise Control (1 Of 2)
    • Charging System (Battery, Starter, Generator) & Cruise Control (2 Of 2)
    • General, Technical Data (Electrical System)
  • Component Locations
    • Driver Assistance Systems
    • RS Q8 - Component Locations
  • Fuses & Circuit Breakers
    • Wires
    • Wiring
  • Gauges
    • Instruments
  • Motors, Switches, Relays
    • Driver Assistance Systems
    • General, Technical Data (Electrical System)
    • Wiring
  • Starter
    • Charging System (Battery, Starter, Generator) & Cruise Control (1 Of 2)
    • Charging System (Battery, Starter, Generator) & Cruise Control (2 Of 2)
  • Wiring Diagrams
    • OEM Wiring Diagrams
    • System Wiring Diagrams
    • Using lemon2025'S System Wiring Diagrams
    • Wires
    • Wiring
• Engine Mechanical
  • Blowers, Superchargers & Turbochargers
    • Turbocharger, Supercharger - (8-Cylinder Direct Injection 4.0L 4V TFSI Engine Ea825)
    • Turbocharger, Supercharger - (Servicing - 8-Cylinder 4.0L 4V TFSI Engine Ea825)
  • Cooling System (Mechanical)
    • Cooling System (8-Cylinder Direct Injection 4.0L 4V TFSI Engine Ea825)
    • Cooling System (Servicing 8-Cylinder 4.0L 4V TFSI Engine Ea825)
  • Exhaust
    • Exhaust System, Emission Controls (8-Cylinder Direct Injection 4.0L 4V TFSI Engine Ea825)
    • Exhaust System, Emission Controls (Servicing 8-Cylinder 4.0L 4V TFSI Engine Ea825)
    • General, Technical Data (Servicing - 8-Cylinder 4.0L 4V TFSI Engine Ea825)
  • Fuel System
    • Fuel Supply
    • Fuel Supply (Fuel System EVAP Leak Test)
    • General, Technical Data (Servicing - 8-Cylinder 4.0L 4V TFSI Engine Ea825)
    • MULTIPORT Fuel Injection - (8-Cylinder Direct Injection 4.0L 4V TFSI Engine Ea825)
    • MULTIPORT Fuel Injection - (Servicing - 8-Cylinder 4.0L 4V TFSI Engine Ea825)
  • Lubrication System
    • General, Technical Data (Oil Gauge Tester T40178 Service Values)
    • General, Technical Data (Servicing - 8-Cylinder 4.0L 4V TFSI Engine Ea825)
    • Lubrication - (8-Cylinder Direct Injection 4.0L 4V TFSI Engine Ea825)
    • Lubrication - (Servicing - 8 Cylinder 4.0L 4V TFSI Engine Ea825)
  • Mechanical
    • Crankshaft, Cylinder Block (8-Cylinder Direct Injection 4.0L 4V TFSI Engine Ea825)
    • Crankshaft, Cylinder Block (Servicing 8-Cylinder 4.0L 4V TFSI Engine Ea825)
    • Cylinder Head, VALVETRAIN (8-Cylinder Direct Injection 4.0L 4V TFSI Engine Ea825)
    • Cylinder Head, VALVETRAIN (Servicing 8-Cylinder 4.0L 4V TFSI Engine Ea825)
    • General, Technical Data (8-Cylinder Direct Injection 4.0L 4V TFSI Engine Ea825)
    • General, Technical Data (Servicing - 8-Cylinder 4.0L 4V TFSI Engine Ea825)
  • Starter
    • Charging System (Battery, Starter, Generator) & Cruise Control (1 Of 2)
    • Charging System (Battery, Starter, Generator) & Cruise Control (2 Of 2)
• Engine Performance
  • Emissions
    • Emission Applications
    • Emission Control Abbreviations
    • State Emission Standards - Diesel
    • State Emission Standards - Gas
  • Fuel Delivery
    • Fuel Supply
    • Fuel Supply (Fuel System EVAP Leak Test)
    • General, Technical Data (Servicing - 8-Cylinder 4.0L 4V TFSI Engine Ea825)
    • MULTIPORT Fuel Injection - (8-Cylinder Direct Injection 4.0L 4V TFSI Engine Ea825)
    • MULTIPORT Fuel Injection - (Servicing - 8-Cylinder 4.0L 4V TFSI Engine Ea825)
  • Ignition System
    • Ignition/Glow Plug System (8-Cylinder Direct Injection 4.0L 4V TFSI Engine Ea825)
    • Ignition/Glow Plug System (Servicing - 8-Cylinder 4.0L 4V TFSI Engine Ea825)
  • Specifications
    • Firing Order & Cylinder Identification
  • Tune-Up
    • Ignition/Glow Plug System (8-Cylinder Direct Injection 4.0L 4V TFSI Engine Ea825)
    • Ignition/Glow Plug System (Servicing - 8-Cylinder 4.0L 4V TFSI Engine Ea825)
  • Wiring Diagrams
    • Wires
• 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
  • 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
  • Hoist/Jack
    • General Information
  • Identification
    • CANADIAN Model Cross-Reference
    • General Information
  • Metric Conversions
    • Engine Displacement Conversion Table - ECAT
    • Metric Conversions
  • OEM General Information
    • Automatic Stop/Start Disable
    • General Information
  • Reset Procedures
    • General Information
  • Specifications Index
    • Common Specifications & Procedures
    • General, Technical Data (8-Cylinder Direct Injection 4.0L 4V TFSI Engine Ea825)
    • General, Technical Data (8-Speed Automatic Transmission 0D6)
    • General, Technical Data (Servicing - 8-Cylinder 4.0L 4V TFSI Engine Ea825)
  • Steering
    • Map - Steering, Suspension, Wheel Alignment, Wheels & Tires
    • Wheel Alignment Theory & Operation - General Information
  • Technical Data (Suspension)
  • Towing
    • General Information
    • Wheels, Tires And Wheel Alignment (Towing Guide)
  • Traction Control Disable Procedures
  • Trouble Shooting - Manual Transmission - General Information
• Heating, Ventilation & A/C (HVAC)
  • A/C Compressor
    • Air Conditioning (1 Of 3)
    • Air Conditioning (2 Of 3)
    • Air Conditioning (3 Of 3)
    • Air Conditioning (Refrigerant R1234YF Servicing) (1 Of 2)
    • Air Conditioning (Refrigerant R1234YF Servicing) (2 Of 2)
    • Air Conditioning (Refrigerant R134A Servicing) (1 Of 3)
    • Air Conditioning (Refrigerant R134A Servicing) (2 Of 3)
    • Air Conditioning (Refrigerant R134A Servicing) (3 Of 3)
  • General Servicing
    • Air Conditioning (1 Of 3)
    • Air Conditioning (2 Of 3)
    • Air Conditioning (3 Of 3)
    • Air Conditioning (Refrigerant R1234YF Servicing) (1 Of 2)
    • Air Conditioning (Refrigerant R1234YF Servicing) (2 Of 2)
    • Air Conditioning (Refrigerant R134A Servicing) (1 Of 3)
    • Air Conditioning (Refrigerant R134A Servicing) (2 Of 3)
    • Air Conditioning (Refrigerant R134A Servicing) (3 Of 3)
    • General, Technical Data (HVAC)
    • General, Technical Data (Refrigerant R1234YF Servicing)
  • HVAC Control Systems
    • Air Conditioning (1 Of 3)
    • Air Conditioning (2 Of 3)
    • Air Conditioning (3 Of 3)
    • Air Conditioning (Refrigerant R1234YF Servicing) (1 Of 2)
    • Air Conditioning (Refrigerant R1234YF Servicing) (2 Of 2)
    • Air Conditioning (Refrigerant R134A Servicing) (1 Of 3)
    • Air Conditioning (Refrigerant R134A Servicing) (2 Of 3)
    • Air Conditioning (Refrigerant R134A Servicing) (3 Of 3)
    • General, Technical Data (HVAC)
    • General, Technical Data (Refrigerant R1234YF Servicing)
    • Heating, Ventilation
• Hybrid/Electric Powertrain
  • Cooling Systems
    • Cooling System (8-Cylinder Direct Injection 4.0L 4V TFSI Engine Ea825)
    • Cooling System (Servicing 8-Cylinder 4.0L 4V TFSI Engine Ea825)
  • Electric Motor Systems
    • Engine Assembly (8-Cylinder Direct Injection 4.0L 4V TFSI Engine Ea825)
    • Engine Assembly (Servicing - 8-Cylinder 4.0L 4V TFSI Engine Ea825)
• Maintenance
  • Procedures
    • General Information
    • Maintenance, Diagnosis (2020 AUDI Service)
    • Maintenance, Diagnosis (Engine Oil: Specialty Engine Oils)
    • Maintenance, Diagnosis (Fluid Capacity Tables - 2020)
    • Maintenance, Diagnosis (Fluid Capacity Tables & Maintenance Schedule - 2020)
    • Maintenance, Diagnosis (My 2020 AUDI Maintenance Schedule)
  • Schedule
    • Maintenance, Diagnosis (Fluid Capacity Tables & Maintenance Schedule - 2020)
    • Maintenance, Diagnosis (My 2020 AUDI Maintenance Schedule)
• Restraints
  • Air Bag, SRS
    • General, Technical Data (Body Interior)
    • Passenger Protection, Airbags, Seat Belts
  • Passive Restraints
    • General, Technical Data (Body Interior)
    • Interior Equipment
    • Passenger Protection, Airbags, Seat Belts
• Steering
  • Electronic Steering
    • Wheels, Tires And Wheel Alignment (Suspension, Wheels, Steering)
  • Manual Steering
  • Power Steering
  • Steering Column
  • Steering Gear
  • Steering Linkage
• Suspension
  • Electronic Suspension
    • Level Control System
  • Front Suspension
  • Rear Suspension
  • Wheels, Tires And Wheel Alignment (Suspension, Wheels, Steering)
  • Wheels & Tire System
    • Wheels, Tires And Wheel Alignment (Suspension, Wheels, Steering)
    • Wheels, Tires And Wheel Alignment (Wheel And Tire Guide General Information)
    • Wheels, Tires, Wheel Alignment (Wheel And Tire Guide)
• Transmission
  • Automatic Trans
    • General, Technical Data (8-Speed Automatic Transmission 0D6)
    • Torque Converter (8-Speed Automatic Transmission 0D6)
  • Manual Trans
    • Gears, Hydraulic Controls (8-Speed Automatic Transmission 0D6)
    • General, Technical Data (8-Speed Automatic Transmission 0D6)
  • Transmission Control Systems
    • Controls, Housing (8-Speed Automatic Transmission 0D6)
    • Gears, Hydraulic Controls (8-Speed Automatic Transmission 0D6)
• External Pages