B2201low severityBody
Rear Parking Sensor Circuit
on 2021 Audi A6 2.0L Turbo I4 · AWD
What this code means
Malfunction in the rear parking/proximity sensor system.
Symptoms
- Rear parking sensors not working
- Constant false alarm beeping when reversing
- Parking display shows error
- Sensor reads incorrectly
Common causes
- Faulty ultrasonic sensor
- Sensor obstructed by dirt or snow
- Wiring damage from trailer hitch installation
- Module failure
- Bumper replacement with incorrect sensor gaps
Diagnostic steps
- Clean rear sensors thoroughly
- Test each sensor with scan tool
- Inspect wiring (especially if trailer hitch installed)
- Check sensor seating in bumper
- Test parking assist module
Repair notes
Replace faulty sensor. Clean sensors. Check for wiring damage from aftermarket trailer hitch.
Other Body codes on this vehicle
B0001
Driver Frontal Stage 1 Deployment Control
B0002
Driver Frontal Stage 2 Deployment Control
B0003
Passenger Frontal Stage 1 Deployment Control
B0004
Passenger Frontal Stage 2 Deployment Control
B0005
Driver Knee Airbag Deployment Circuit
B0006
Passenger Knee Airbag Deployment Circuit
B0007
Rear Left Side Airbag Deployment Circuit
B0008
Rear Right Side Airbag Deployment Circuit
B0009
Rear Center Airbag Deployment Circuit
B0010
Driver Side Airbag Deployment