Repair and Diagnosis

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• Quick Lookups
  • Common Specs & Procedures (A7/A7 QUATTRO)
  • DTC Index
    • 3.0L - DTC Index - Engine Code: CGXB
    • 3.0L - DTC Index - Engine Code: CTUA, CGXB
  • Electrical Component Locations
    • A7 - Component Locations
    • Electrical Components Locations & Connector End Views
  • Fluids
  • Technical Bulletins
    • Campaigns
    • Safety Recalls
    • Tech Tips
    • Technical Service Bulletins
  • Tire Fitment
  • Wiring Diagrams
    • Electrical Components Locations & Connector End Views
    • OEM Connector End Views
    • System Wiring Diagrams
    • Using lemon2025'S System Wiring Diagrams
• Accessories & Equipment
  • Anti-Theft Systems
    • Front Doors & Central Locking System
    • Immobilizer And Trailer Hitch - General Information
    • Interior Lights, Lamps & Switches
  • Cruise Control Systems
    • Battery, Generator & Cruise Control
  • Entertainment Systems
    • Interior Lights, Lamps & Switches
  • Exterior Lights
    • Exterior Lights & Switches
    • Hid Headlamp Usage & Safety Precautions
  • Gauges & Instrument Panels
    • Instruments
  • Headlights
    • Exterior Lights & Switches
    • Hid Headlamp Usage & Safety Precautions
  • Infotainment
    • Interior Lights, Lamps & Switches
  • Interior/Exterior Trim
    • Exterior Equipment
    • Interior Equipment
    • Interior Trim
  • Interior/Illumination Lights
    • Interior Lights, Lamps & Switches
  • Mirrors
    • Exterior Equipment
  • Seats
    • Body Interior - General & Technical Data
    • Interior Equipment
    • Seat Frames
    • Seat Upholstery & Covers
  • Window Motors & Regulators
    • Front Doors & Central Locking System
    • Glass & Window Regulators
    • Rear Doors
  • Wiper/Washer Systems
    • Washer Fluid Hoses
    • Wiper/Washer Systems
  • Wiring System (Data Link Connectors, Pwr Dist., Grnd Dist.)
    • Wires - General Information
    • Wiring
• Body & Frame
  • Door Locks
    • Front Doors & Central Locking System
    • Immobilizer And Trailer Hitch - General Information
    • Interior Lights, Lamps & Switches
  • Exterior Body Panels
    • Body Exterior - Body Front
    • Body Exterior - Bumpers
    • Exterior Body Panels (Hood, Lids)
    • Exterior Equipment
    • Front Doors & Central Locking System
    • Rear Doors
  • Exterior/Interior Trim
    • Exterior Equipment
    • Interior Equipment
    • Interior Trim
  • Mirrors
    • Exterior Equipment
  • Seats
    • Body Interior - General & Technical Data
    • Interior Equipment
    • Seat Frames
    • Seat Upholstery & Covers
  • Sun Roof/T-Top/Convertible Top
    • Sunroof
  • Towing Systems
    • Immobilizer And Trailer Hitch - General Information
    • Interior Lights, Lamps & Switches
  • Windows
    • Front Doors & Central Locking System
    • Glass & Window Regulators
    • Rear Doors
• Brakes
  • Anti-Lock Brakes
    • Anti-Lock Brake System
    • Brake System - General & Technical Data
  • Brakes Control Systems
    • Brake System - General & Technical Data
  • Mechanical - Hydraulic
    • Brake System - Hydraulic Components
    • Brake System - Mechanical Components
  • Parking Brake System
    • Brake System - General & Technical Data
    • Brake System - Mechanical Components
  • Traction Control
    • Anti-Lock Brake System
    • Brake System - General & Technical Data
• Drivelines & Axles
  • Axle Shafts
    • Rear Final Drive 0BC, 0BD, 0BE & 0BF - General & Technical Data
    • Rear Final Drive 0BF & 0BE - Sport Differential - General & Technical Data
    • Rear Suspension
  • Differentials & Drive Axles
    • Final Drive & Differential - Automatic Transmission
    • Rear Final Drive 0BC, 0BD, 0BE & 0BF
    • Rear Final Drive 0BC, 0BD, 0BE & 0BF - General & Technical Data
    • Rear Final Drive 0BF & 0BE - Sport Differential - General & Technical Data
    • Rear Final Drive 0BF And 0BE
  • Driveshaft & Universal Joints
    • Rear Final Drive 0BC, 0BD, 0BE & 0BF
    • Rear Final Drive 0BF And 0BE
  • Wheel Hubs
    • Rear Suspension
• Electrical
  • Body Electrical
    • OEM Connector End Views
    • Wires - General Information
    • Wiring
  • Charging Systems
    • Battery, Generator & Cruise Control
    • Battery, Starter & Generator
  • Component Locations
    • A7 - Component Locations
    • Electrical Components Locations & Connector End Views
  • Fuses & Circuit Breakers
    • Fuse And Relay Diagrams -- A7
    • Wires - General Information
    • Wiring
  • Gauges
    • Instruments
  • Motors, Switches, Relays
    • OEM Connector End Views
    • Wires - General Information
    • Wiring
  • Starter
    • Battery, Generator & Cruise Control
    • Battery, Starter & Generator
  • Wiring Diagrams
    • Electrical Components Locations & Connector End Views
    • OEM Connector End Views
    • System Wiring Diagrams
    • Using lemon2025'S System Wiring Diagrams
• Engine Mechanical
  • Auxiliary Emission Control Systems
    • 3.0L - Exhaust System & Emission Controls - Engine Code(S): CGXB & CTUA
  • Blowers, Superchargers & Turbochargers
    • 3.0L - Generic Scan Tool - Engine Code: CGXB (2 Of 2)
    • 3.0L - Turbocharger & Supercharger - Engine Code(S): CGXB & CTUA
  • Cooling Fan
    • 3.0L - Cooling System - Engine Code(S): CGXB & CTUA
  • Cooling System (Mechanical)
    • 3.0L - Cooling System - Engine Code(S): CGXB & CTUA
    • 3.0L - Engine Mechanical, Fuel Injection & Ignition - General & Technical Data - Engine Code(S): CGXB & CTUA
    • 3.0L - Generic Scan Tool - Engine Code: CGXB (2 Of 2)
    • Fluid Capacity Tables
    • Maintenance Procedures
  • Exhaust
    • 3.0L - Exhaust System & Emission Controls - Engine Code(S): CGXB & CTUA
    • 3.0L - Generic Scan Tool - Engine Code: CGXB (1 Of 2)
    • Suspension, Wheels & Steering - General & Technical Data
  • Fuel System
    • 3.0L - Engine Mechanical, Fuel Injection & Ignition - General & Technical Data - Engine Code(S): CGXB & CTUA
    • 3.0L - Generic Scan Tool - Engine Code: CGXB (1 Of 2)
    • 3.0L - Generic Scan Tool - Engine Code: CGXB (2 Of 2)
    • 3.0L - MULTIPORT Fuel Injection - Engine Code(S): CGXB & CTUA
    • 3.0L & 4.0L - Fuel Supply - Engine Code(S): CEUC, CGXB, CRDB & CTUA
    • 3.0L & 4.0L - Fuel Supply System - General & Technical Data - Engine Code(S): CGXB, CEUC, CRDB & CTUA
    • Suspension, Wheels & Steering - General & Technical Data
  • Lubrication System
    • 3.0L - Lubrication - Engine Code(S): CGXB & CTUA
    • Fluid Capacity Tables
    • Maintenance Procedures
    • Suspension, Wheels & Steering - General & Technical Data
  • Mechanical
    • 3.0L - Crankshaft & Cylinder Block - Engine Code(S): CGXB & CTUA
    • 3.0L - Cylinder Head & VALVETRAIN - Engine Code(S): CGXB & CTUA
    • 3.0L - Engine Assembly - Engine Code(S): CGXB & CTUA
    • 3.0L - Engine Mechanical, Fuel Injection & Ignition - General & Technical Data - Engine Code(S): CGXB & CTUA
    • 3.0L - Generic Scan Tool - Engine Code: CGXB (1 Of 2)
    • 3.0L - Generic Scan Tool - Engine Code: CGXB (2 Of 2)
    • 3.0L - Ignition System - Engine Code(S): CGXB & CTUA
    • 3.0L - Lubrication - Engine Code(S): CGXB & CTUA
    • 3.0L - MULTIPORT Fuel Injection - Engine Code(S): CGXB & CTUA
    • Fluid Capacity Tables
    • Maintenance Procedures
    • Suspension, Wheels & Steering - General & Technical Data
  • Starter
    • Battery, Generator & Cruise Control
    • Battery, Starter & Generator
• Engine Performance
  • Emissions
    • Emission Applications
    • Emission Control Abbreviations
    • State Emission Standards - Diesel
    • State Emission Standards - Gas
  • Engine Control Systems
    • 3.0L - Generic Scan Tool - Engine Code: CGXB (1 Of 2)
    • 3.0L - Generic Scan Tool - Engine Code: CGXB (2 Of 2)
    • 3.0L - MULTIPORT Fuel Injection - Engine Code(S): CGXB & CTUA
  • Fuel Delivery
    • 3.0L - Engine Mechanical, Fuel Injection & Ignition - General & Technical Data - Engine Code(S): CGXB & CTUA
    • 3.0L - Generic Scan Tool - Engine Code: CGXB (1 Of 2)
    • 3.0L - Generic Scan Tool - Engine Code: CGXB (2 Of 2)
    • 3.0L - MULTIPORT Fuel Injection - Engine Code(S): CGXB & CTUA
    • 3.0L & 4.0L - Fuel Supply - Engine Code(S): CEUC, CGXB, CRDB & CTUA
    • 3.0L & 4.0L - Fuel Supply System - General & Technical Data - Engine Code(S): CGXB, CEUC, CRDB & CTUA
    • Suspension, Wheels & Steering - General & Technical Data
  • Ignition System
    • 3.0L - Engine Mechanical, Fuel Injection & Ignition - General & Technical Data - Engine Code(S): CGXB & CTUA
    • 3.0L - Generic Scan Tool - Engine Code: CGXB (1 Of 2)
    • 3.0L - Generic Scan Tool - Engine Code: CGXB (2 Of 2)
    • 3.0L - Ignition System - Engine Code(S): CGXB & CTUA
    • Suspension, Wheels & Steering - General & Technical Data
  • Mode 6
    • 3.0L - Generic Scan Tool - Engine Code: CGXB (1 Of 2)
  • Specifications
    • Firing Order & Cylinder Identification
  • System
    • 3.0L - Generic Scan Tool - Engine Code: CGXB (1 Of 2)
    • 3.0L - Generic Scan Tool - Engine Code: CGXB (2 Of 2)
  • Testing & Diagnosis
    • 3.0L - Generic Scan Tool - Engine Code: CGXB (1 Of 2)
    • 3.0L - Generic Scan Tool - Engine Code: CGXB (2 Of 2)
  • Tune-Up
    • 3.0L - Engine Mechanical, Fuel Injection & Ignition - General & Technical Data - Engine Code(S): CGXB & CTUA
    • 3.0L - Generic Scan Tool - Engine Code: CGXB (1 Of 2)
    • 3.0L - Generic Scan Tool - Engine Code: CGXB (2 Of 2)
    • 3.0L - Ignition System - Engine Code(S): CGXB & CTUA
    • Suspension, Wheels & Steering - General & Technical Data
• 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
  • OBD-II Drive Cycles
  • 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
    • 3.0L - DTC Index - Engine Code: CGXB
    • 3.0L - DTC Index - Engine Code: CTUA, CGXB
  • 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
  • OEM General Information
    • Automatic Stop/Start Disable
    • Wiring
  • Reset Procedures
    • ATEQ TPMS Reset Procedure (09)
    • BARTEC TPMS Reset Procedure
    • Maintenance Reminder Light (Reset Procedures)
    • Tire Pressure Monitor Systems
  • Specifications Index
    • Common Specs & Procedures (A7/A7 QUATTRO)
  • 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
    • Heating, Ventilation & Air Conditioning - General & Technical Data
    • Refrigerant R134A Servicing (Checking Pressures)
    • Refrigerant R134A Servicing (Refrigerant Circuit)
  • HVAC Control Systems
    • Heating, Ventilation & Air Conditioning - General & Technical Data
    • Heating, Ventilation & Air Conditioning (A/C Compressor & Actuators)
    • Heating, Ventilation & Air Conditioning (Actuators - Front Heater And A/C Unit)
    • Heating, Ventilation & Air Conditioning (Air Guide, Coolant Circuit, Display&Control Head,Additional Components)
    • Heating, Ventilation & Air Conditioning (Specifications - Refrigerant Circuit)
• Maintenance
  • Procedures
    • Fluid Capacity Tables
    • Maintenance Intervals
    • Maintenance Procedures
    • Maintenance Reminder Light (Reset Procedures)
• Restraints
  • Air Bag, SRS
    • Body Interior - General & Technical Data
    • Passenger Protection, Airbags & Seat Belts
  • Passive Restraints
    • Body Interior - General & Technical Data
    • Interior Equipment
    • Passenger Protection, Airbags & Seat Belts
• Steering
  • Manual Steering
    • Steering
    • Suspension, Wheels & Steering - General & Technical Data
  • Power Steering
    • Steering
    • Suspension, Wheels & Steering - General & Technical Data
  • Steering Column
    • Steering
    • Suspension, Wheels & Steering - General & Technical Data
  • Steering Control Systems
    • Steering
    • Suspension, Wheels & Steering - General & Technical Data
  • Steering Gear
    • Steering
    • Suspension, Wheels & Steering - General & Technical Data
  • Steering Linkage
    • Steering
    • Suspension, Wheels & Steering - General & Technical Data
• Suspension
  • Electronic Suspension
    • Self-Leveling Suspension
  • Front Suspension
    • Suspension, Wheels & Steering
    • Suspension, Wheels & Steering - General & Technical Data
    • Wheel & Tire Guide
    • Wheels & Tire - General Information
  • Rear Suspension
    • Rear Suspension
    • Suspension, Wheels & Steering
    • Suspension, Wheels & Steering - General & Technical Data
    • Wheel & Tire Guide
    • Wheels & Tire - General Information
  • Wheel Alignment
    • AUDI Wheel Alignment Specifications - A7
    • Suspension, Wheels & Steering
  • Wheels & Tire System
    • Suspension, Wheels & Steering
    • Suspension, Wheels & Steering - General & Technical Data
    • Wheel & Tire Guide
    • Wheels & Tire - General Information
• Transmission
  • Automatic Trans
    • 3.0L - Generic Scan Tool - Engine Code: CGXB (1 Of 2)
    • 3.0L - Generic Scan Tool - Engine Code: CGXB (2 Of 2)
    • Automatic Transmission - Controls & Housing
    • Automatic Transmission - General & Technical Data
    • Automatic Transmission - Torque Converter
    • Final Drive & Differential - Automatic Transmission
    • Gears & Hydraulic Controls - Automatic Transmission
  • Transmission Control Systems
    • Automatic Transmission - Controls & Housing
    • Final Drive & Differential - Automatic Transmission
• External Pages