Rain/Light Sensor Circuit Malfunction
2007-2015 Lincoln MKX 3.7L V6 🇩🇪
Description
Malfunction in the rain and light sensor mounted on the windshield behind the rearview mirror. The sensor controls automatic wipers and headlights.
Symptoms
- Auto wipers not working
- Wipers activating in dry conditions
- Auto headlights not responding
- Rain sensor indicator flashing
Common Causes
- Faulty rain/light sensor
- Windshield replacement with incorrect glass
- Sensor lens contaminated
- Wiring to sensor damaged
- Sensor mounting gel pad deteriorated
Diagnostic Steps
- Clean sensor lens area on windshield
- Check sensor mounting and gel pad
- Verify windshield is compatible with sensor
- Test sensor output with scan tool
- Inspect wiring at rearview mirror base
Repair Notes
Replace rain/light sensor or reinstall with new gel pad. Ensure windshield has sensor-compatible coating.
Related Codes
Other Body Codes
- B0001Driver Frontal Stage 1 Deployment Control
- B0001Driver Frontal Stage 1 Deployment Control
- B0002Driver Frontal Stage 2 Deployment Control
- B0002Driver Frontal Stage 2 Deployment Control
- B0003Passenger Frontal Stage 1 Deployment Control
- B0003Passenger Frontal Stage 1 Deployment Control
- B0004Passenger Frontal Stage 2 Deployment Control
- B0004Passenger Frontal Stage 2 Deployment Control
- B0005Driver Knee Airbag Deployment Circuit
- B0005Driver Knee Airbag Deployment Circuit
B2AAA on Other Vehicles
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Lincoln Continental
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Common Questions
What does code B2AAA mean on a 2007-2015 Lincoln MKX?
B2AAA stands for "Rain/Light Sensor Circuit Malfunction". Malfunction in the rain and light sensor mounted on the windshield behind the rearview mirror. The sensor controls automatic wipers and headlights.
What are the symptoms of B2AAA on a Lincoln MKX?
Common symptoms of B2AAA include: Auto wipers not working, Wipers activating in dry conditions, Auto headlights not responding, Rain sensor indicator flashing.
What causes B2AAA on a 2007-2015 Lincoln MKX?
Common causes of B2AAA include: Faulty rain/light sensor, Windshield replacement with incorrect glass, Sensor lens contaminated, Wiring to sensor damaged, Sensor mounting gel pad deteriorated.