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.
2025 Toyota GR86 Base, Automatic TransFACTORY OEM SERVICE PROCEDURE
Lighting System
LIGHTING SYSTEM DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION
| DTC Code | Description |
|---|---|
| B2900 | AHL Control |
| B2904 | LED Head Light Circuit RH |
| B2905 | LED Head Light Circuit LH |
| B2908 | Steering Responsive Headlight Actuator RH |
| B2909 | Steering Responsive Headlight Actuator LH |
| B2910 | Steering Responsive Headlight Communication RH |
| B2911 | Steering Responsive Headlight Communication LH |
| B2916 | Auto Headlamp Leveling Circuit |
| B2917 | Auto Headlamp Leveling Switch Stuck |
| B2918 | Auto Headlamp Leveling Actuator Motor Circuit |
| B2919 | Auto Headlamp Leveling Sensor Signal |
| B291A | Auto Headlamp Leveling Sensor Range/Performance |
| U0074 | Control Module Communication Bus "BODY-CAN" Off |
| U0101 | Lost Communication with TCM |
| U0122 | Lost Communication With Vehicle Dynamics Control Module |
| U0402 | Invalid Data Received From TCM |
| U0416 | Invalid Data Received From Vehicle Dynamics Control Module |
| U1140 | Lost Communication With Body Control Module BODY-CAN |
| U1422 | Invalid Data Received From Body Control Module BODY-CAN |
Factory Service Tools
Use the Manual With the Right Hardware
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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.