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 MANUALSTOYOTA2025PRIUS PLUG-IN HYBRID XSE PREMIUMREPAIR AND DIAGNOSIS (SINGLE PAGE)GENERAL INFORMATIONDTC INDEXDTC INDEX (1 OF 3)ADVANCED DRIVER ASSISTANCE SYSTEM DTCSFRONT RADAR SENSOR SYSTEM
2025 Toyota Prius Plug-In Hybrid XSE Premium
Front Radar Sensor System
2025 Toyota Prius Plug-In Hybrid XSE PremiumSECTION Front Radar Sensor System
FRONT RADAR SENSOR SYSTEM DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION
| DTC Code | Description |
|---|---|
| C1A11-00 | Front Radar Sensor Optical Axis Misalignment Malfunction |
| C1A8C-04 | Main Microcomputer in Front Radar Sensor System Internal Failure |
| C1A8C-46 | Main Microcomputer in Front Radar Sensor Calibration/Parameter Memory Failure |
| C1A8D-1C | Power Supply Circuit in Front Radar Sensor Circuit Voltage Out of Range |
| C1A90-00 | Malfunction of Millimeter-wave Circuit in Front Radar Sensor |
| U0104-87 | Lost Communication with Cruise Control Module Missing Message |
| U130C-51 | Software Incompatibility with Image Processing Module "A" Not Programmed |
| U130C-57 | Software Incompatibility with Image Processing Module "A" Invalid/Incompatible Software Component |
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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.