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.
2016 Subaru WRX BaseFACTORY OEM SERVICE PROCEDURE
Auto Headlight Beam Leveler System DTCS
AUTO HEADLIGHT BEAM LEVELER SYSTEM DIAGNOSTIC TROUBLE CODE (DTC) LIST
| DTC | Item | Description |
|---|---|---|
| U0073 | Control Module Communication Bus Off | < Ref. to DTC U0073 CONTROL MODULE COMMUNICATION BUS OFF , Diagnostic Procedure with Diagnostic Trouble Code (DTC). > |
| U0122 | Lost Communication With Vehicle Dynamics Control Module | < Ref. to DTC U0122 LOST COMMUNICATION WITH VEHICLE DYNAMICS CONTROL MODULE , Diagnostic Procedure with Diagnostic Trouble Code (DTC). > |
| U0140 | Lost Communication With Body Control Module | < Ref. to DTC U0140 LOST COMMUNICATION WITH BODY CONTROL MODULE , Diagnostic Procedure with Diagnostic Trouble Code (DTC). > |
| U0416 | Invalid Data Received From Vehicle Dynamics Control Module | < Ref. to DTC U0416 INVALID DATA RECEIVED FROM VEHICLE DYNAMICS CONTROL MODULE , Diagnostic Procedure with Diagnostic Trouble Code (DTC). > |
| U0422 | Invalid Data Received From Body Control Module | < Ref. to DTC U0422 INVALID DATA RECEIVED FROM BODY CONTROL MODULE , Diagnostic Procedure with Diagnostic Trouble Code (DTC). > |
| B2900 | AHL Control | < Ref. to DTC B2900 AHL CONTROL , Diagnostic Procedure with Diagnostic Trouble Code (DTC). > |
| B2902 | Rear Height Sensor Circuit | < Ref. to DTC B2902 REAR HEIGHT SENSOR CIRCUIT , Diagnostic Procedure with Diagnostic Trouble Code (DTC). > |
| B2904 | Led Headlight Circuit RH | < Ref. to DTC B2904 LED HEADLIGHT CIRCUIT RH , Diagnostic Procedure with Diagnostic Trouble Code (DTC). > |
| B2905 | Led Head Light Circuit LH | < Ref. to DTC B2905 LED HEAD LIGHT CIRCUIT LH , Diagnostic Procedure with Diagnostic Trouble Code (DTC). > |
Factory Service Tools
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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.
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