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.
2023 Subaru Ascent BaseFACTORY OEM SERVICE PROCEDURE
Steering Angle Sensor DTCS
STEERING ANGLE SENSOR DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION
| DTC | Description | Reference |
|---|---|---|
| C1E00 | REGISTRATION FAULT OF AUTHENTICATION UNIT | Ref. to STEERING ANGLE SENSOR>DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)>DTC C1E00 REGISTRATION FAULT OF AUTHENTICATION UNIT . |
| U1C00 | INVALID AUTHENTICATION DATA RECEIVED FROM GATEWAY | Ref. to STEERING ANGLE SENSOR>DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)>DTC U1C00 INVALID AUTHENTICATION DATA RECEIVED FROM GATEWAY . |
| U1E00 | LOST COMMUNICATION OF AUTHENTICATION DATA WITH GATEWAY "A" PU-BUS | Ref. to STEERING ANGLE SENSOR>DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)>DTC U1E00 LOST COMMUNICATION OF AUTHENTICATION DATA WITH GATEWAY "A" PU-BUS . |
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.