The B1380 code on your 2023 Acura MDX indicates a malfunction in the Blind Spot Information (BSI) system. This code affects your MDX's ability to detect vehicles in your blind spot areas, signaling a fault with the radar sensors, processing module, or associated circuits.
Understanding B1380 on Acura MDX
The Blind Spot Information system uses radar sensors in the rear bumper to detect vehicles alongside and approaching from behind. When a vehicle is detected in your blind spot, an indicator illuminates in the corresponding side mirror. Code B1380 indicates this system has a detected fault.
Common Symptoms
- BSI warning light on dashboard
- BSI system disabled message
- Blind spot indicators don't illuminate
- False alerts or erratic warnings
- One side works but other doesn't
- System activates then disables
Primary Causes- Radar sensor failure
- Sensor blocked by dirt/ice/damage
- Wiring damage to sensors
- Rear bumper damage affecting sensors
- BSI control module fault
- CAN communication issue
- Sensor misalignment after collision repair
Diagnostic Procedure for 2023 MDX
Using Acura HDS or compatible scan tool, access BSI system data. Check for specific sensor faults - left or right. Inspect rear bumper sensors for damage, dirt, or blockage. Verify sensors are properly aligned if bumper has been repaired. Check radar sensor connectors. Monitor CAN communication for BSI module.
Repair Solutions
Clean blocked sensors - dirt, ice, or snow can cause temporary malfunctions. Replace damaged radar sensors. Repair wiring to sensors if damaged. If bumper was repaired after collision, verify sensor alignment. Replace BSI control module if faulty. Sensor aiming may be required after replacement. Clear codes and road test to verify proper detection.