Audi , A6 , C8 , 45 TFSI Quattro (2019-) Common Issues
- DTC B1230: Lost Communication between Engine Control Module (ECM) and Transmission Control Module (TCM) - The TFSI engine's 45 kW/hour battery can cause communication loss.
- Faulty Water Pump - Early production models had issues with the water pump, which could lead to engine overheating.
- Transmission Slipping/Shuddering - Some owners have reported slipping or shuddering of the 7-speed S-tronic transmission when shifting gears.
- DTC C1201: Front Right Wheel Speed Sensor Faulty - The wheel speed sensor on the front right wheel can become faulty, triggering this code.
- DTC P0010: Turbocharger Boost Control Solenoid Circuit Malfunction - Some owners have reported issues with the turbocharger's boost control solenoid circuit.
- Faulty Fuel Pressure Sensor - The fuel pressure sensor in some 2019 models can become faulty, leading to this DTC code (P0299).
- DTC B1231: Rear Axle Speed Sensor Faulty - Similar to the front right wheel speed sensor issue, the rear axle speed sensor can also be faulty.
- Faulty Air Mass Meter - Some owners have reported issues with the air mass meter's electrical circuit, leading to decreased engine performance.
- DTC P0133: Oxygen Sensor Heater Circuit Malfunction (Bank 1) - The oxygen sensor heater circuit in some models can malfunction, triggering this code.
- Faulty Rear Right Brake Light Switch - Some owners have reported issues with the brake light switch on the rear right side of the vehicle.
- DTC P0087: Fuel System Pressure Sensor Circuit Malfunction - This DTC code has been reported by some owners, indicating an issue with the fuel system pressure sensor circuit.
- Faulty Parking Brake Light Switch - The parking brake light switch can become faulty, leading to issues with the vehicle's electrical systems.
- DTC P0336: Engine Speed Sensor Circuit Malfunction - This DTC code has been reported by some owners, indicating an issue with the engine speed sensor circuit.
- Faulty Cruise Control Switch - The cruise control switch can become faulty, leading to issues with the vehicle's adaptive cruise control system.
- DTC P0500: Vehicle Speed Sensor Circuit Malfunction - This DTC code has been reported by some owners, indicating an issue with the vehicle speed sensor circuit.
- Faulty Air Conditioning Compressor Clutch - Some owners have reported issues with the air conditioning compressor clutch's electrical circuit.
- DTC P0461: Fuel Level Sensor Circuit Malfunction - This DTC code has been reported by some owners, indicating an issue with the fuel level sensor circuit.
- Faulty Window Regulator Motor - The window regulator motor on some models can become faulty, leading to issues with the vehicle's power windows.
- DTC P0603: Control Module Power-Ground Short to Battery - This DTC code has been reported by some owners, indicating a short circuit between the control module and the battery.
- Faulty Rearview Camera Electrical Circuit - Some owners have reported issues with the rearview camera's electrical circuit, leading to decreased functionality or complete failure of the camera system.
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