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.
2017 Toyota Prius C TwoFACTORY OEM SERVICE PROCEDURE
Pre-Collision System
PRE-COLLISION SYSTEM DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION [11/2015 - 06/2017]
| DTC Code | Description |
|---|---|
| C1A47 | Steering Angle Sensor |
| C1A48 | G Sensor |
| C1A4B | Stop Light Relay Circuit |
| C1A50 | Brake System Malfunction |
| C1A62 | Brake Control Signal Malfunction |
| C1A63 | Other System Malfunction |
| C1AA0 | Front Camera Module Circuit |
| C1AA3 | Vehicle Speed Sensor Circuit |
| C1AA4 | Yaw Rate Sensor Circuit |
| C1AA5 | Yaw Rate Sensor Power Supply Voltage Circuit |
| C1AA7 | Skid Control Buzzer Circuit |
| C1AA8 | Front Camera Module Incorrect Axial Gap |
| C1AA9 | Front Camera Module Beam Axis Not Adjusted |
| C1AAA | FCM Destination Information Uninitialized |
| U0123 | Lost Communication with Yaw Rate Sensor Module |
| U0126 | Lost Communication with Steering Angle Sensor Module |
| U0129 | Lost Communication with Brake System Control Module |
| U023A | Lost Communication with Front Camera Module |
| U0293 | Lost Communication with Hybrid Control Module |
PRE-COLLISION SYSTEM DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION [06/2017 - ]
| DTC Code | Description |
|---|---|
| C1A47 | Steering Angle Sensor |
| C1A48 | G Sensor |
| C1A4B | Stop Light Relay Circuit |
| C1A50 | Brake System Malfunction |
| C1A62 | Brake Control Signal Malfunction |
| C1A63 | Other System Malfunction |
| C1AA0 | Front Camera Module Circuit |
| C1AA3 | Vehicle Speed Sensor Circuit |
| C1AA4 | Yaw Rate Sensor Circuit |
| C1AA5 | Yaw Rate Sensor Power Supply Voltage Circuit |
| C1AA8 | Front Camera Module Incorrect Axial Gap |
| C1AA9 | Front Camera Module Beam Axis Not Adjusted |
| C1AAA | FCM Destination Information Uninitialized |
| C1AAF | Heater Activation Relay Open |
| U0123 | Lost Communication with Yaw Rate Sensor Module |
| U0126 | Lost Communication with Steering Angle Sensor Module |
| U0129 | Lost Communication with Brake System Control Module |
| U023A | Lost Communication with Front Camera Module |
| U0293 | Lost Communication with Hybrid Control Module |
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.
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.
Rather have a pro handle this?
A certified mobile mechanic comes to your home or office. They bring the tools, you stay comfortable. No tow truck, no waiting room, no surprises.
Comes to youSame-day available12-month warranty
Get a Free QuoteNo obligation. See pricing before you book.