Vehicle troubleshooting Audi 80 B4
Cooling system
Cylinder head gasket defect Slow drop in coolant level. Coolant enters the combustion chamber in small amounts. This can take quite a long time. Attention! A...
Cylinder head gasket defect Slow drop in coolant level. Coolant enters the combustion chamber in small amounts. This can take quite a long time. Attention! A...
Fuel injection system Mono-Motronic
A cold engine does not start at all or starts poorly Fuse 13, 21, 25, 27 or 28 defective. Replace the faulty fuse. Defective additional resistance wire. Check...
A cold engine does not start at all or starts poorly Fuse 13, 21, 25, 27 or 28 defective. Replace the faulty fuse. Defective additional resistance wire. Check...
Digifant injection system
A cold engine does not start at all or starts poorly Fuse 13, 21, 25, 27 or 28 defective Replace the faulty fuse Defective injection system power relay Check...
A cold engine does not start at all or starts poorly Fuse 13, 21, 25, 27 or 28 defective Replace the faulty fuse Defective injection system power relay Check...
Injection system KE-III-Jetronic
Cold engine won't start Defective or unadjusted air-fuel mixture corrector Check the air-fuel mixture corrector and the control unit Idle speed control valve...
Cold engine won't start Defective or unadjusted air-fuel mixture corrector Check the air-fuel mixture corrector and the control unit Idle speed control valve...
MPI and MPFI injection systems
A cold engine does not start at all or starts poorly Fuse 13, 21, 27, 28 or 32 defective Replace the fuse Fuel pump relay defective Check the relay and replace...
A cold engine does not start at all or starts poorly Fuse 13, 21, 27, 28 or 32 defective Replace the fuse Fuel pump relay defective Check the relay and replace...
Diesel Engine Fuel System (TD)
The engine starts poorly or does not start at all There is no fuel in the tank Fill up Preheating time too short Preheat until the preheat control light goes...
The engine starts poorly or does not start at all There is no fuel in the tank Fill up Preheating time too short Preheat until the preheat control light goes...
Fuel system of diesel engines (TDI)
Decrease in effective engine power Intake manifold temperature sensor defective Check the sensor Fuel temperature sensor defective Check the sensor Injector...
Decrease in effective engine power Intake manifold temperature sensor defective Check the sensor Fuel temperature sensor defective Check the sensor Injector...
Clutch
The clutch is slipping Wear of the clutch driven disc linings Replace the slave disk Clutch clamping force too weak Replace the clutch pressure plate The pads...
The clutch is slipping Wear of the clutch driven disc linings Replace the slave disk Clutch clamping force too weak Replace the clutch pressure plate The pads...
Power steering system
Power steering fluid level too low Air got into the system during refueling and was "removed" on its own Add fluid up to the "Max" mark Leak in the hydraulic...
Power steering fluid level too low Air got into the system during refueling and was "removed" on its own Add fluid up to the "Max" mark Leak in the hydraulic...
Brake system
When braking, the car pulls to the side Different tire pressures Check cold tire pressure Uneven tire wear Replace the tires Brake pads are oily, hardened or...
When braking, the car pulls to the side Different tire pressures Check cold tire pressure Uneven tire wear Replace the tires Brake pads are oily, hardened or...
Battery and generator
When the ignition is turned on, the red charging indicator light does not light The battery is discharged Perform a tow jump start or jump start using a...
When the ignition is turned on, the red charging indicator light does not light The battery is discharged Perform a tow jump start or jump start using a...
Starter
When turning the ignition key to the "Start" position, the starter turns the engine slowly or does not work at all The indicator lights are dim or out The...
When turning the ignition key to the "Start" position, the starter turns the engine slowly or does not work at all The indicator lights are dim or out The...
Windscreen wiper
The windshield wiper does not work Fuse defective Replace the fuse Defective X-contact unloading relay Check the relay The windshield wiper drive crank has...
The windshield wiper does not work Fuse defective Replace the fuse Defective X-contact unloading relay Check the relay The windshield wiper drive crank has...
Heating and ventilation system
Insufficient air heating The heater activation rod has broken or the heater activation rotary lever is faulty Check and replace if necessary The warm air duct...
Insufficient air heating The heater activation rod has broken or the heater activation rotary lever is faulty Check and replace if necessary The warm air duct...
This section is available on russian, bulgarian, belarusian, ukrainian, serbian, croatian, romanian, polish, slovak, hungarian
Similar sections of other Audi car models:
General information: Troubleshooting Audi 100 C3 (1982-1990, diesel)
General information: Troubleshooting Audi A4 B7 (2004-2008)
General information: Troubleshooting Audi A6 C5 Allroad (1999-2005)
General information: Troubleshooting Audi 100 C3 (1982-1990, diesel)
General information: Troubleshooting Audi A4 B7 (2004-2008)
General information: Troubleshooting Audi A6 C5 Allroad (1999-2005)
Share information:
- General information
- User manual
- Maintenance
- Troubleshooting
- Power unit
- Engine
- Cooling system
- Heating and ventilation
- Petrol injection
- Diesel fuel system
- Fuel system
- Exhaust systems
- Ignition system
- Transmission
- Clutch
- Car gearbox
- Chassis
- Brake system
- Suspension and steering wheel
- Body
- Body and trim
- Electrical equipment
- Electrical system
- Electrical circuits
- General information
- Repair characteristics
- Maintenance
- Power unit
- Gasoline engine
- Diesel engine
- Engine lubrication system
- Fuel system (gasoline)
- Injection system (gasoline)
- Fuel system (diesel)
- Ignition system
- Cooling system
- Heater
- Exhaust system
- Transmission
- Clutch and gearbox
- Chassis
- Steering
- Brake system
- Car suspension
- Body
- Body elements
- Electrical equipment
- Power devices
- Lighting and appliances
- Electrical circuits
- General information
- User manual
- Maintenance
- Power unit
- Engine 4-cylinder
- Engine 5-cylinder
- Cooling system
- Fuel and exhaust systems
- Ignition system
- Transmission
- Clutch
- Mechanical transmission
- Automatic transmission
- Drive shafts
- Chassis
- Brake system
- Suspension
- Steering
- Body
- Exterior
- Interior
- Electrical equipment
- Equipment and devices
- Electrical circuits