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.
2016 Lexus GS 450h BaseFACTORY OEM SERVICE PROCEDURE
Power Steering System
POWER STEERING SYSTEM DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION [09/2014 - 10/2015]
| DTC Code | Description |
|---|---|
| C1511/11 | Torque Sensor 1 Malfunction |
| C1512/11 | Torque Sensor 2 Malfunction |
| C1513/11 | Torque Sensor Deviation Excessive |
| C1515/15 | Torque Sensor Zero Point Adjustment is not Initialized |
| C1516/16 | Torque Sensor Zero Point Adjustment Incomplete |
| C1521/24 | Short in Motor Circuit |
| C1522/24 | Power Supply Sensor |
| C1523/24 | Current Deviation Excessive |
| C1524/24 | Motor Terminal Voltage Malfunction |
| C1525/17 | Rotation Angle Sensor Initialization Undone |
| C1526/18 | Rotation Angle Sensor Initialization Incomplete |
| C1528/12 | Motor Rotation Angle Sensor Malfunction |
| C1531/25 | ECU Malfunction |
| C1532/25 | ECU Malfunction |
| C1533/25 | Temperature Sensor Circuit is Low or High |
| C1534/25 | EEPROM Malfunction |
| C1541/13 | Vehicle Speed Signal |
| C1546/31 | HV-ECU Malfunction |
| C1548/31 | Active Steering Control Malfunction |
| C1552/22 | PIG Power Supply Voltage Malfunction |
| C1555/25 | Motor Relay Welding Failure |
| C1562/27 | DC-DC Converter PIG Power Supply Voltage |
| C1564/27 | Lost Communication with WDD Signal of DC-DC Converter |
| C1565/27 | Lost Communication with LDD/ASST Signal of DC-DC Converter |
| C1566/27 | Lost Communication with PSOK Signal of DC-DC Converter |
| C1567/44 | Error in Matching of ECUs |
| C1568/27 | DC-DC Converter |
| C1569/23 | Battery Power Supply Voltage |
| C1581/26 | Assist Map Number Un-Writing |
| C1582/26 | Assist Map Number Mismatch |
| U0129/42 | Lost Communication with Brake System Control Module |
| U0130/44 | Lost Communication with Steering Effort Control Module |
| U0132/43 | Lost Communication with Ride Level Control Module |
| U0134/44 | Lost Communication with DRS Module |
| U0293/41 | Lost Communication with Hybrid Control Module |
| U1104/45 | Lost Communication with Driving Support ECU |
POWER STEERING SYSTEM DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION [10/2015 - ]
| DTC Code | Description |
|---|---|
| C1511/11 | Torque Sensor 1 Malfunction |
| C1512/11 | Torque Sensor 2 Malfunction |
| C1513/11 | Torque Sensor Deviation Excessive |
| C1515/15 | Torque Sensor Zero Point Adjustment is not Initialized |
| C1516/16 | Torque Sensor Zero Point Adjustment Incomplete |
| C1521/24 | Short in Motor Circuit |
| C1522/24 | Power Supply Sensor |
| C1523/24 | Current Deviation Excessive |
| C1524/24 | Motor Terminal Voltage Malfunction |
| C1525/17 | Rotation Angle Sensor Initialization Undone |
| C1526/18 | Rotation Angle Sensor Initialization Incomplete |
| C1528/12 | Motor Rotation Angle Sensor Malfunction |
| C1531/25 | ECU Malfunction |
| C1532/25 | ECU Malfunction |
| C1533/25 | Temperature Sensor Circuit is Low or High |
| C1534/25 | EEPROM Malfunction |
| C1541/13 | Vehicle Speed Signal |
| C1548/31 | Active Steering Control Malfunction |
| C1552/22 | PIG Power Supply Voltage Malfunction |
| C1555/25 | Motor Relay Welding Failure |
| C1567/44 | Error in Matching of ECUs |
| C1568/27 | DC-DC Converter |
| C1581/26 | Assist Map Number Un-Writing |
| C1582/26 | Assist Map Number Mismatch |
| U0129/42 | Lost Communication with Brake System Control Module |
| U0130/44 | Lost Communication with Steering Effort Control Module |
| U0132/43 | Lost Communication with Ride Level Control Module |
| U0134/44 | Lost Communication with DRS Module |
| U0293/41 | Lost Communication with Hybrid Control Module |
| U1104/45 | Lost Communication with Driving Support ECU |
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.