B2201low severityBody
Rear Parking Sensor Circuit
on 2021 Lincoln Aviator 3.0L V6 Twin Turbo · 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
B0001
Driver Frontal Stage 1 Deployment Control
B0002
Driver Frontal Stage 2 Deployment Control
B0002
Driver Frontal Stage 2 Deployment Control
B0003
Passenger Frontal Stage 1 Deployment Control
B0003
Passenger Frontal Stage 1 Deployment Control
B0004
Passenger Frontal Stage 2 Deployment Control
B0004
Passenger Frontal Stage 2 Deployment Control
B0005
Driver Knee Airbag Deployment Circuit
B0005
Driver Knee Airbag Deployment Circuit