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 MANUALSTOYOTA2009COROLLA S, 1.8 U, STANDARDREPAIR AND DIAGNOSIS (SINGLE PAGE)GENERAL INFORMATIONDTC INDEXBRAKE CONTROL / DYNAMIC CONTROL SYSTEM DTCSVEHICLE STABILITY CONTROL SYSTEM DTCSVSC DTCS
2009 Toyota Corolla S, 1.8 U, Standard
VSC DTCS
2009 Toyota Corolla S, 1.8 U, StandardSECTION VSC DTCS
VSC - DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION
| DTC | Description |
|---|---|
| C1201 | Engine Control System Malfunction |
| C1203 | ECM Communication Circuit Malfunction |
| C1210 | Zero Point Calibration of Yaw Rate Sensor Undone |
| C1231 | Steering Angle Sensor Circuit Malfunction |
| C1232 | Stuck in Acceleration Sensor |
| C1234 | Yaw Rate Sensor Malfunction |
| C1290 | Steering Angle Sensor Zero Point Malfunction |
| C1336 | Zero Point Calibration of Acceleration Sensor Undone |
| U0100 | Lost Communication with ECM / PCM |
| U0123 | Lost Communication with Yaw Rate Sensor Module |
| U0126 | Lost Communication with Steering Angle Sensor Module |
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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.