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.
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HOMESERVICE MANUALSACURA2008RLREPAIR AND DIAGNOSISQUICK LOOKUPSDTC INDEXADAPTIVE FRONT LIGHTING DTCS
2008 Acura RL
Adaptive Front Lighting DTCS
2008 Acura RLSECTION Adaptive Front Lighting DTCS
NOTE:
Retrieval of some diagnostic codes may require the use of special OEM tester or flash method using instrument cluster indicator. For procedures/testing of codes not shown below, refer to appropriate system article.
ADAPTIVE FRONT LIGHTING DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION
| DTC | Description |
|---|---|
| DTC B2105 | Adaptive Front Lighting Control Unit Lost Communication with Gauge Control Module (STEERING Message) |
| DTC B2106 | Adaptive Front Lighting Control Unit Lost Communication with Gauge Control Module (A/T Message) |
| DTC B2107 | Adaptive Front Lighting Control Unit Lost Communication with MICU (MICU Message) |
| DTC B2108 | Adaptive Front Lighting Control Unit Lost Communication with Combination Switch Control Unit (HLSW Message) |
| DTC B2125 | Steering Angle Sensor Signal Error |
| DTC B2126 | Steering Angle Sensor Z Pulse Line or Supply Line Open |
| DTC B2127 | Steering Angle Sensor Malfunction |
| DTC B2128 | Steering Angle Sensor Signal Error |
| DTC B2129 | Steering Angle Sensor Circuit Malfunction |
| DTC B2130 | A Short in the Steering Angle Sensor Z Pulse Line |
| DTC B2131 | Steering Angle Sensor (MAX) Error |
| DTC B2132 | Steering Angle Sensor Learning Error |
| DTC B2134 | Wheel Speed (RLP, RRP line) Circuit Open |
| DTC B2135 | A/T Reverse Signal Error |
| DTC B2136 | Left Adaptive Front Lighting Gearbox Motor Signal Error |
| DTC B2137 | Right Adaptive Front Lighting Gearbox Motor Signal Error |
| DTC B2139 | Headlight Leveling Motor Power Supply Circuit Error |
| DTC B2140 | Headlight Leveling Motor Signal Circuit Error |
| DTC B2141 | Suspension Stroke Sensor Output Error |
| DTC B2142 | Adaptive Front Lighting Control Unit Sub CPU Communication Error |
| DTC B2143 | Adaptive Front Lighting Control Unit Sub CPU Memory Error |
| DTC B2144 | Adaptive Front Lighting Control Unit Sub CPU EEPROM Error |
| DTC B2145 | Left Adaptive Front Lighting Gearbox Motor Swing Error |
| DTC B2146 | Right Adaptive Front Lighting Gearbox Motor Swing Error |
RENDER: 1.0x
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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.