Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Blind Spot Information (BSI) System DTC Troubleshooting Index
2015 Acura RLXSECTION Blind Spot Information (BSI) System DTC Troubleshooting Index
Left Side BSI Radar Unit DTC
| DTC | Detection Item |
|---|---|
| B18A1 | Left Side BSI Radar Unit Internal Circuit Error |
| B18A5 | Left Side BSI Radar Unit Temperature High |
| B18B4 | Left Side BSI Radar Unit Dirty |
| B18B8 | Left Side BSI Radar Unit Azimuth Off Alignment |
| B18BA | Different Version in the Left and Right Side BSI Radar Unit |
| B18C5 | Short to GND in the Left Side BSI Radar Unit Indicator Circuit |
| B18C6 | Short to Power in the Left Side BSI Radar Unit Indicator Circuit |
| B18C7 | Open in the Left Side BSI Radar Unit Indicator Circuit |
| U1280 | Communication Bus Line Error (Bus-Off) |
| U1281 | Left Side BSI Radar Unit Lost Communication With MICU |
| U128D | Left Side BSI Radar Unit Lost Communication With Gauge Control Module |
| U1297 | Left Side BSI Radar Unit Lost Communication With Right Side BSI Radar Unit |
Right Side BSI Radar Unit DTC
| DTC | Detection Item |
|---|---|
| B1E51 | Right Side BSI Radar Unit Internal Circuit Error |
| B1E55 | Right Side BSI Radar Unit Temperature High |
| B1E64 | Right Side BSI Radar Unit Dirty |
| B1E68 | Right Side BSI Radar Unit Azimuth Off Alignment |
| B1E6A | Different Version in the Left and Right Side BSI Radar Unit |
| B1E75 | Short to GND in the Right Side BSI Radar Unit Indicator Circuit |
| B1E76 | Short to Power in the Right Side BSI Radar Unit Indicator Circuit |
| B1E77 | Open in the Right Side BSI Radar Unit Indicator Circuit |
| U1280 | Communication Bus Line Error (Bus-Off) |
| U1281 | Right Side BSI Radar Unit Lost Communication With MICU |
| U128D | Right Side BSI Radar Unit Lost Communication With Gauge Control Module |
| U128F | Right Side BSI Radar Unit Lost Communication With Left Side BSI Radar Unit |
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.