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.
2012 Lexus LS 460L AWDFACTORY OEM SERVICE PROCEDURE
Electronically Controlled Brake System
ABS DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION
| DTC Code | Description |
|---|---|
| C0200/31 | Front Speed Sensor RH Circuit |
| C0205/32 | Front Speed Sensor LH Circuit |
| C0210/33 | Rear Speed Sensor RH Circuit |
| C0215/34 | Rear Speed Sensor LH Circuit |
| C1235/35 | Foreign Object is Attached on Tip of Front Speed Sensor RH |
| C1236/36 | Foreign Object is Attached on Tip of Front Speed Sensor LH |
| C1238/38 | Foreign Object is Attached on Tip of Rear Speed Sensor RH |
| C1239/39 | Foreign Object is Attached on Tip of Rear Speed Sensor LH |
| C1240/95 | Yaw Rate Sensor Discrimination |
| C1243/43 | Acceleration Sensor Stuck Malfunction |
| C1244/44 | Open or Short in Deceleration Sensor Circuit |
| C1245/45 | Acceleration Sensor Output Malfunction |
| C1336/98 | Zero Point Calibration of Acceleration Sensor Undone |
| C1381/97 | Acceleration Sensor Power Supply Voltage Malfunction |
| C1442/44 | Invalid Data Received from Deceleration Sensor |
| U0124/95 | Lost Communication with Lateral Acceleration Sensor Module |
| U0073/94 | Control Module Communication Bus OFF |
VSC DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION
| DTC Code | Description |
|---|---|
| C1210/36 | Zero Point Calibration of Yaw Rate Sensor Undone |
| C1231/31 | Steering Angle Sensor Circuit Malfunction |
| C1234/34 | Yaw Rate Sensor Malfunction |
| C1289/41 | VGRS Control System Malfunction |
| C1290/66 | Steering Angle Sensor Zero Point Malfunction |
| C1437/65 | Lost Communication with Engine ECU |
| 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 |
| U0130/68 | Lost Communication with Steering Effort Control Module |
ELECTRONICALLY CONTROLLED BRAKE SYSTEM DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION
| DTC Code | Description |
|---|---|
| C1202/68 | Master Reservoir Level Malfunction |
| C1203/95 | ECM Communication Circuit Malfunction |
| C1242/42 | Open in IG1 / IG2 Power Source Circuit |
| C1246/46 | Master Cylinder Pressure Sensor Malfunction |
| C1247/47 | Stroke Sensor Malfunction |
| C1249/49 | Open in Stop Light Switch Circuit |
| C1252/52 | Brake Booster Pump Motor on Time Abnormally Long |
| C1253/53 | Pump Motor Relay Malfunction |
| C1256/57 | Accumulator Low Pressure |
| C1300 | Skid Control ECU Malfunction |
| C1311/11 | Open in Main Relay 1 Circuit |
| C1312/12 | Short in Main Relay 1 Circuit |
| C1313/13 | Open in Main Relay 2 Circuit |
| C1314/14 | Short in Main Relay 2 Circuit |
| C1315/31 | SMC1 Changeover Solenoid Malfunction |
| C1316/32 | SMC2 Changeover Solenoid Malfunction |
| C1319/35 | SCSS Changeover Solenoid Malfunction |
| C1341/62 | Front Hydraulic System RH Malfunction |
| C1342/63 | Front Hydraulic System LH Malfunction |
| C1343/64 | Rear Hydraulic System RH Malfunction |
| C1344/65 | Rear Hydraulic System LH Malfunction |
| C1345/66 | Linear Solenoid Valve Offset Learning Undone |
| C1352/21 | Front Increasing Pressure Solenoid RH Malfunction |
| C1353/23 | Front Increasing Pressure Solenoid LH Malfunction |
| C1354/25 | Rear Increasing Pressure Solenoid RH Malfunction |
| C1355/27 | Rear Increasing Pressure Solenoid LH Malfunction |
| C1356/22 | Front Decreasing Pressure Solenoid RH Malfunction |
| C1357/24 | Front Decreasing Pressure Solenoid LH Malfunction |
| C1358/26 | Rear Decreasing Pressure Solenoid RH Malfunction |
| C1359/28 | Rear Decreasing Pressure Solenoid LH Malfunction |
| C1364/61 | Wheel Cylinder Pressure Sensor Malfunction |
| C1365/54 | Accumulator Pressure Sensor Malfunction |
| C1368/67 | Linear Solenoid Valve Offset Malfunction |
| C1377/43 | Capacitor Malfunction |
| C1378/44 | Capacitor Communication Malfunction |
| C1391/69 | Accumulator Leak Malfunction |
| C1392/48 | Stroke Sensor Zero Point Calibration Undone |
ABS & ELECTRONICALLY CONTROLLED BRAKE SYSTEM DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION
| DTC Code | Description |
|---|---|
| C1241/41 | Low Battery Positive Voltage |
BRAKE HOLD DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION
| DTC Code | Description |
|---|---|
| C13AF/11 | Electric Parking Brake System Malfunction |
| U0128/13 | Lost Communication with Park Brake Control Module |
ABS TEST MODE DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION
| DTC Code | Description |
|---|---|
| C1271/71 | Low Output Signal of Front Speed Sensor RH (Test Mode DTC) |
| C1272/72 | Low Output Signal of Front Speed Sensor LH (Test Mode DTC) |
| C1273/73 | Low Output Signal of Rear Speed Sensor RH (Test Mode DTC) |
| C1274/74 | Low Output Signal of Rear Speed Sensor LH (Test Mode DTC) |
| C1275/75 | Abnormal Change in Output Signal of Front Speed Sensor RH (Test Mode DTC) |
| C1276/76 | Abnormal Change in Output Signal of Front Speed Sensor LH (Test Mode DTC) |
| C1277/77 | Abnormal Change in Output Signal of Rear Speed Sensor RH (Test Mode DTC) |
| C1278/78 | Abnormal Change in Output Signal of Rear Speed Sensor LH (Test Mode DTC) |
| C1279/79 | Deceleration Sensor Output Voltage Malfunction (Test Mode DTC) |
| C1281/81 | Master Cylinder Pressure Sensor Output Malfunction (Test Mode DTC) |
ELECTRONICALLY CONTROLLED BRAKE SYSTEM TEST MODE DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION
| DTC Code | Description |
|---|---|
| C1346/71 | Stroke Sensor Zero Point Learning Malfunction (Test Mode DTC) |
VSC TEST MODE DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION
| DTC Code | Description |
|---|---|
| C0371/71 | Yaw Rate Sensor (Test Mode DTC) |
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.
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