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.
2009 Toyota Avalon XLSFACTORY OEM SERVICE PROCEDURE
Brake Control DTCS: VSC
VSC DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION
| DTC Code | Description |
|---|---|
| C1201/51 | Engine Control System Malfunction |
| C1203/53 | ECM Communication Circuit Malfunction |
| C1210/36 | Zero Point Calibration of Yaw Rate Sensor Undone |
| C1223/43 | ABS Control System Malfunction |
| C1231/31 | Steering Angle Sensor Circuit Malfunction |
| C1232/32 | Stuck in Deceleration Sensor |
| C1234/34 | Yaw Rate Sensor Malfunction |
| C1290/66 | Steering Angle Sensor Zero Point Malfunction |
| C1336/39 | Zero Point Calibration of Acceleration Sensor Undone |
| C1439/66 | Steering Angle Sensor Initialization Incomplete |
| C1440/98 | Steering Angle Sensor Unusual Bank Angle Detected |
| C1443/34 | Invalid Data Received from Yaw Rate Sensor |
| C1445/66 | Vehicle Driven with Steering Angle Sensor not Initialized |
| U0100/65 | Lost Communication with ECM/PCM |
| U0123/62 | Lost Communication with Yaw Rate Sensor Module |
| U0126/63 | Lost Communication with Steering Angle Sensor Module |
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.