Rear Impact Sensor Circuit
2011-2015 Lincoln MKX 3.7L V6
Description
Malfunction in the rear impact sensor circuit. This sensor detects rear-end collision severity for fuel shutoff and restraint deployment.
Symptoms
- Airbag warning light on
- SRS fault stored
- Rear collision protection degraded
Common Causes
- Faulty rear impact sensor
- Wiring damage from rear collision
- Trunk area moisture intrusion
- Sensor mounting loose
Diagnostic Steps
- Scan SRS codes
- Inspect rear impact sensor in trunk or rear panel area
- Check wiring
- Measure circuit resistance
Repair Notes
Replace rear impact sensor or repair wiring. Check for moisture intrusion in trunk area.
Related Codes
Other Body Codes
- B0001Driver Frontal Stage 1 Deployment Control
- B0002Driver Frontal Stage 2 Deployment Control
- B0003Passenger Frontal Stage 1 Deployment Control
- B0004Passenger Frontal Stage 2 Deployment Control
- B0005Driver Knee Airbag Deployment Circuit
- B0006Passenger Knee Airbag Deployment Circuit
- B0007Rear Left Side Airbag Deployment Circuit
- B0008Rear Right Side Airbag Deployment Circuit
- B0009Rear Center Airbag Deployment Circuit
- B0010Driver Side Airbag Deployment
B0043 on Other Vehicles
Lincoln Aviator
2003-2005 4.6L V8
Lincoln Aviator
2003-2005 4.6L V8 DOHC
Lincoln Aviator
2020-2024 3.0L Twin-Turbo V6
Lincoln Aviator
2020-2024 3.0L V6 Twin Turbo
Lincoln Aviator Grand Touring
2020-2024 3.0L Twin Turbo V6 PHEV
Lincoln Aviator Grand Touring
2020-2024 3.0L Twin-Turbo V6 Hybrid
Lincoln Aviator Grand Touring
2020-2024 3.0L V6 Twin Turbo Hybrid
Lincoln Continental
2017-2020 2.7L EcoBoost V6
Common Questions
What does code B0043 mean on a 2011-2015 Lincoln MKX?
B0043 stands for "Rear Impact Sensor Circuit". Malfunction in the rear impact sensor circuit. This sensor detects rear-end collision severity for fuel shutoff and restraint deployment.
What are the symptoms of B0043 on a Lincoln MKX?
Common symptoms of B0043 include: Airbag warning light on, SRS fault stored, Rear collision protection degraded.
What causes B0043 on a 2011-2015 Lincoln MKX?
Common causes of B0043 include: Faulty rear impact sensor, Wiring damage from rear collision, Trunk area moisture intrusion, Sensor mounting loose.