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.
2021 Lexus RX 350 Base, AWDFACTORY OEM SERVICE PROCEDURE
Vehicle Stability Control System
VEHICLE STABILITY CONTROL SYSTEM DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION - [09/2015 - 08/2016]
| DTC Code | Description |
|---|---|
| C1203 | ECM Communication Circuit Malfunction |
| C120B | IG Supply Voltage Low |
| C1210 | Zero Point Calibration of Yaw Rate Sensor Undone |
| C1225 | SM Solenoid Circuit |
| C1232 | Acceleration Sensor Stuck Malfunction |
| C1240 | Yaw Rate Sensor Discrimination |
| C1241 | Low Power Supply Voltage Malfunction |
| C1243 | Acceleration Sensor Stuck Malfunction |
| C1245 | Acceleration Sensor Output Malfunction |
| C1290 | Steering Angle Sensor Zero Point Malfunction |
| C1336 | Zero Point Calibration of Acceleration Sensor Undone |
| C1380 | Stop Light Control Relay Malfunction |
| C1381 | Acceleration Sensor Power Supply Voltage Malfunction |
| C13AF | EPB System Malfunction |
| C1401 | Front Speed Sensor RH Malfunction |
| C1402 | Front Speed Sensor LH Malfunction |
| C1403 | Rear Speed Sensor RH Malfunction |
| C1404 | Rear Speed Sensor LH Malfunction |
| C1405 | Open or Short in Front Speed Sensor RH Circuit |
| C1406 | Open or Short in Front Speed Sensor LH Circuit |
| C1407 | Open or Short in Rear Speed Sensor RH Circuit |
| C1408 | Open or Short in Rear Speed Sensor LH Circuit |
| C1413 | Front Speed Sensor RH Output Malfunction |
| C1414 | Front Speed Sensor LH Output Malfunction |
| C1415 | Rear Speed Sensor RH Output Malfunction |
| C1416 | Rear Speed Sensor LH Output Malfunction |
| C1417 | High Power Supply Voltage Malfunction |
| C1419 | Acceleration Sensor Internal Circuit |
| C1420 | Acceleration Sensor Malfunction |
| C1421 | Open or Short in Master Cylinder Pressure Sensor |
| C1422 | Master Cylinder Pressure Sensor Zero Point High Malfunction |
| C1423 | Master Cylinder Pressure Sensor Zero Point Low Malfunction |
| C1424 | Master Cylinder Pressure Sensor Output Malfunction |
| C1425 | Open in Stop Light Switch Circuit |
| C1426 | Stop Light Switch OFF Stuck Malfunction |
| C1427 | Motor Malfunction |
| C1428 | Motor Circuit Malfunction |
| C1429 | Open or Short in Brake Pedal Load Sensing Switch |
| C142A | Master Cylinder Pressure Sensor Internal Malfunction |
| C142B | Motor Power Supply Voltage Circuit |
| C1430 | Brake Pedal Load Sensing Switch OFF Stuck Malfunction |
| C1431 | Brake Pedal Load Sensing Switch ON Stuck Malfunction |
| C1432 | Steering Angle Sensor Power Source Voltage Malfunction |
| C1433 | Steering Angle Sensor Internal Circuit |
| C1434 | Steering Angle Sensor Output Malfunction |
| C1435 | Yaw Rate Sensor Internal Circuit |
| C1436 | Yaw Rate Sensor Malfunction |
| C1437 | Lost Communication with ECM |
| C1439 | Steering Angle Sensor Initialization Incomplete |
| C1440 | Steering Angle Sensor Unusual Bank Angle Detected |
| C1442 | Invalid Data Received from Acceleration Sensor |
| C1443 | Invalid Data Received from Yaw Rate Sensor |
| C1445 | Vehicle Driven with Steering Angle Sensor not Initialized |
| C1449 | Master Cylinder Output Value Malfunction |
| C1468 | SFR Solenoid Circuit |
| C1469 | SFL Solenoid Circuit |
| C146A | SRR Solenoid Circuit |
| C146B | SRL Solenoid Circuit |
| C146C | Open in ABS Motor Relay Circuit |
| C146D | Short in ABS Motor Relay Circuit |
| C146E | Open in ABS Solenoid Relay Circuit |
| C146F | Short in ABS Solenoid Relay Circuit |
| U0073 | Control Module Communication Bus OFF |
| U0100 | Lost Communication with ECM |
| U0124 | Lost Communication with Lateral Acceleration Sensor Module |
| U0126 | Lost Communication with Steering Angle Sensor Module |
VEHICLE STABILITY CONTROL SYSTEM DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION - [08/2016 - 08/2019]
| DTC Code | Description |
|---|---|
| C1203 | ECM Communication Circuit Malfunction |
| C120B | IG Supply Voltage Low |
| C1210 | Zero Point Calibration of Yaw Rate Sensor Undone |
| C1225 | SM Solenoid Circuit |
| C1232 | Acceleration Sensor Stuck Malfunction |
| C1240 | Yaw Rate Sensor Discrimination |
| C1241 | Low Power Supply Voltage Malfunction |
| C1243 | Acceleration Sensor Stuck Malfunction |
| C1245 | Acceleration Sensor Output Malfunction |
| C1290 | Steering Angle Sensor Zero Point Malfunction |
| C1336 | Zero Point Calibration of Acceleration Sensor Undone |
| C1380 | Stop Light Control Relay Malfunction |
| C1381 | Acceleration Sensor Power Supply Voltage Malfunction |
| C13AF | EPB System Malfunction |
| C1401 | Front Speed Sensor RH Malfunction |
| C1402 | Front Speed Sensor LH Malfunction |
| C1403 | Rear Speed Sensor RH Malfunction |
| C1404 | Rear Speed Sensor LH Malfunction |
| C1405 | Open or Short in Front Speed Sensor RH Circuit |
| C1406 | Open or Short in Front Speed Sensor LH Circuit |
| C1407 | Open or Short in Rear Speed Sensor RH Circuit |
| C1408 | Open or Short in Rear Speed Sensor LH Circuit |
| C1413 | Front Speed Sensor RH Output Malfunction |
| C1414 | Front Speed Sensor LH Output Malfunction |
| C1415 | Rear Speed Sensor RH Output Malfunction |
| C1416 | Rear Speed Sensor LH Output Malfunction |
| C1417 | High Power Supply Voltage Malfunction |
| C1419 | Acceleration Sensor Internal Circuit |
| C1420 | Acceleration Sensor Malfunction |
| C1421 | Open or Short in Master Cylinder Pressure Sensor |
| C1422 | Master Cylinder Pressure Sensor Zero Point High Malfunction |
| C1423 | Master Cylinder Pressure Sensor Zero Point Low Malfunction |
| C1424 | Master Cylinder Pressure Sensor Output Malfunction |
| C1425 | Open in Stop Light Switch Circuit |
| C1426 | Stop Light Switch OFF Stuck Malfunction |
| C1427 | Motor Malfunction |
| C1428 | Motor Circuit Malfunction |
| C1429 | Open or Short in Brake Pedal Load Sensing Switch |
| C142A | Master Cylinder Pressure Sensor Internal Malfunction |
| C142B | Motor Power Supply Voltage Circuit |
| C1430 | Brake Pedal Load Sensing Switch OFF Stuck Malfunction |
| C1431 | Brake Pedal Load Sensing Switch ON Stuck Malfunction |
| C1432 | Steering Angle Sensor Power Source Voltage Malfunction |
| C1433 | Steering Angle Sensor Internal Circuit |
| C1434 | Steering Angle Sensor Output Malfunction |
| C1435 | Yaw Rate Sensor Internal Circuit |
| C1436 | Yaw Rate Sensor Malfunction |
| C1437 | Lost Communication with ECM |
| C1439 | Steering Angle Sensor Initialization Incomplete |
| C1440 | Steering Angle Sensor Unusual Bank Angle Detected |
| C1442 | Invalid Data Received from Acceleration Sensor |
| C1443 | Invalid Data Received from Yaw Rate Sensor |
| C1445 | Vehicle Driven with Steering Angle Sensor not Initialized |
| C1449 | Master Cylinder Output Value Malfunction |
| C1468 | SFR Solenoid Circuit |
| C1469 | SFL Solenoid Circuit |
| C146A | SRR Solenoid Circuit |
| C146B | SRL Solenoid Circuit |
| C146C | Open in ABS Motor Relay Circuit |
| C146D | Short in ABS Motor Relay Circuit |
| C146E | Open in ABS Solenoid Relay Circuit |
| C146F | Short in ABS Solenoid Relay Circuit |
| U0073 | Control Module Communication Bus OFF |
| U0100 | Lost Communication with ECM |
| U0124 | Lost Communication with Lateral Acceleration Sensor Module |
| U0126 | Lost Communication with Steering Angle Sensor Module |
VEHICLE STABILITY CONTROL SYSTEM DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION - [08/2019 - ]
| DTC Code | Description |
|---|---|
| C004013 | Brake Pedal Switch "A" Circuit Open |
| C00409E | Brake Pedal Switch "A" Stuck On |
| C00409F | Brake Pedal Switch "A" Stuck Off |
| C00631F | Yaw Rate Sensor Circuit Intermittent |
| C006328 | Yaw Rate Sensor Signal Bias Level Out of Range / Zero Adjustment Failure |
| C00632A | Yaw Rate Sensor Signal Stuck In Range |
| C006396 | Yaw Rate Sensor Component Internal Failure |
| C050012 | Left Front Wheel Speed Sensor Circuit Short to Battery |
| C050014 | Left Front Wheel Speed Sensor Circuit Short to Ground or Open |
| C05001F | Left Front Wheel Speed Sensor Circuit Intermittent |
| C050023 | Left Front Wheel Speed Sensor Signal Stuck Low |
| C05003A | Left Front Wheel Speed Sensor Signal Has Too Many Pulses |
| C050612 | Right Front Wheel Speed Sensor Circuit Short to Battery |
| C050614 | Right Front Wheel Speed Sensor Circuit Short to Ground or Open |
| C05061F | Right Front Wheel Speed Sensor Circuit Intermittent |
| C050623 | Right Front Wheel Speed Sensor Signal Stuck Low |
| C05063A | Right Front Wheel Speed Sensor Signal Has Too Many Pulses |
| C050C12 | Left Rear Wheel Speed Sensor Circuit Short to Battery |
| C050C14 | Left Rear Wheel Speed Sensor Circuit Short to Ground or Open |
| C050C1F | Left Rear Wheel Speed Sensor Circuit Intermittent |
| C050C23 | Left Rear Wheel Speed Sensor Signal Stuck Low |
| C050C3A | Left Rear Wheel Speed Sensor Signal Has Too Many Pulses |
| C051212 | Right Rear Wheel Speed Sensor Circuit Short to Battery |
| C051214 | Right Rear Wheel Speed Sensor Circuit Short to Ground or Open |
| C05121F | Right Rear Wheel Speed Sensor Circuit Intermittent |
| C051223 | Right Rear Wheel Speed Sensor Signal Stuck Low |
| C05123A | Right Rear Wheel Speed Sensor Signal Has Too Many Pulses |
| C051D54 | Multi-axis Acceleration Sensor Module "A" Missing Calibration |
| C05201C | Multi-axis Acceleration Sensor Module "A" Circuit Voltage Out of Range |
| C05201F | Multi-axis Acceleration Sensor Module "A" Circuit Intermittent |
| C05202A | Multi-axis Acceleration Sensor Module "A" Signal Stuck In Range |
| C052062 | Multi-axis Acceleration Sensor Module "A" Signal Compare Failure |
| C052096 | Multi-axis Acceleration Sensor Module "A" Component Internal Failure |
| C05262A | Steering Angle Sensor Module Signal Stuck In Range |
| C052696 | Steering Angle Sensor Module Component Internal Failure |
| C052C13 | ABS Pump Motor Control Circuit Open |
| C052C1C | ABS Pump Motor Control Circuit Voltage Out of Range |
| C052C49 | ABS Pump Motor Control Internal Electronic Failure |
| C052F14 | ABS Pump Motor Supply Voltage Circuit Short to Ground or Open |
| C054016 | Brake Pressure Sensor "A" Circuit Voltage Below Threshold |
| C054017 | Brake Pressure Sensor "A" Circuit Voltage Above Threshold |
| C05401C | Brake Pressure Sensor "A" Circuit Voltage Out of Range |
| C05401F | Brake Pressure Sensor "A" Circuit Intermittent |
| C054029 | Brake Pressure Sensor "A" Signal Invalid |
| C05402A | Brake Pressure Sensor "A" Signal Stuck In Range |
| C054031 | Brake Pressure Sensor "A" No Signal |
| C054049 | Brake Pressure Sensor "A" Internal Electronic Failure |
| C054096 | Brake Pressure Sensor "A" Component Internal Failure |
| C059749 | Brake System Control Module "A" Internal Electronic Failure |
| C121054 | Yaw Rate Sensor Missing Calibration |
| C122D14 | Brake Master Cylinder Pressure Sensor Supply Voltage Circuit Short to Ground or Open |
| C124000 | Yaw Rate Sensor / Multi-axis Acceleration Sensor Module "A" |
| C124A00 | ECM Communication |
| C124F62 | Yaw Rate Sensor Signal Compare Failure |
| C12A51C | Left Front Wheel ABS Hold Solenoid Control Circuit Voltage Out of Range |
| C12B01C | Left Front Wheel ABS Release Solenoid Control Circuit Voltage Out of Range |
| C12BB1C | Right Front Wheel ABS Hold Solenoid Control Circuit Voltage Out of Range |
| C12C61C | Right Front Wheel ABS Release Solenoid Control Circuit Voltage Out of Range |
| C12D11C | Left Rear Wheel ABS Hold Solenoid Control Circuit Voltage Out of Range |
| C12DC1C | Left Rear Wheel ABS Release Solenoid Control Circuit Voltage Out of Range |
| C12E71C | Right Rear Wheel ABS Hold Solenoid Control Circuit Voltage Out of Range |
| C12F21C | Right Rear Wheel ABS Release Solenoid Control Circuit Voltage Out of Range |
| C12F662 | Left Front Wheel ABS Hold Solenoid / Right Front Wheel ABS Hold Solenoid Signal Compare Failure |
| C12F762 | Left Rear Wheel ABS Hold Solenoid / Right Rear Wheel ABS Hold Solenoid Signal Compare Failure |
| C137BA2 | Brake System Control Module "A" System Voltage System Voltage Low |
| C137BA3 | Brake System Control Module "A" System Voltage System Voltage High |
| C13807E | Stop Lamp Relay Actuator Stuck On |
| C13807F | Stop Lamp Relay Actuator Stuck Off |
| C13BF62 | Brake Pressure Control Solenoid A/B Signal Compare Failure |
| C13C01C | Brake Pressure Control Solenoid "A" Control Circuit Voltage Out of Range |
| C13C91C | Brake Pressure Control Solenoid "B" Control Circuit Voltage Out of Range |
| C142771 | ABS Pump Motor Actuator Stuck |
| C143A7E | ABS Solenoid Control Module Actuator Stuck On |
| C143A7F | ABS Solenoid Control Module Actuator Stuck Off |
| C14D71C | Multi-axis Acceleration Sensor Module "A" Supply Voltage Circuit Voltage Out of Range |
| C14E014 | Left Front Wheel Speed Sensor Supply Voltage Circuit Short to Ground or Open |
| C14E314 | Right Front Wheel Speed Sensor Supply Voltage Circuit Short to Ground or Open |
| C14E614 | Left Rear Wheel Speed Sensor Supply Voltage Circuit Short to Ground or Open |
| C14E914 | Right Rear Wheel Speed Sensor Supply Voltage Circuit Short to Ground or Open |
| C14FE14 | Steering Angle Sensor Supply Voltage Circuit Short to Ground or Open |
| P057111 | Brake Switch "A" Circuit Short to Ground |
| P057113 | Brake Switch "A" Circuit Open |
| U007488 | Control Module Communication Bus "B" Off Bus Off |
| U010087 | Lost Communication with ECM/PCM "A" Missing Message |
| U010187 | Lost Communication with TCM Missing Message |
| U012587 | Lost Communication with Multi-axis Acceleration Sensor Module Missing Message |
| U012687 | Lost Communication with Steering Angle Sensor Module Missing Message |
| U015187 | Lost Communication with Restraints Control Module Missing Message |
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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