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 MANUALSTOYOTA2025HIGHLANDER PLATINUMREPAIR AND DIAGNOSISGENERAL INFORMATIONDTC INDEXDTC INDEX (5 OF 6)POWER ASSIST SYSTEMS DTCSPOWER STEERING SYSTEM
2025 Toyota Highlander Platinum
Power Steering System
2025 Toyota Highlander PlatinumSECTION Power Steering System
POWER STEERING SYSTEM DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION [12/2019 - 11/2023]
| DTC Code | Description |
|---|---|
| C1511 | Torque Sensor1 |
| C1512 | Torque Sensor2 |
| C1513 | Torque Sensor Deviation Excessive |
| C1514 | Torque Sensor Power Supply Voltage |
| C1515 | Torque Sensor Zero Point Adjustment Undone |
| C1516 | Torque Sensor Zero Point Adjustment Incomplete |
| C1521 | Short in Motor Circuit |
| C1522 | Power Supply Sensor |
| C1523 | Current Deviation Excessive |
| C1528 | Motor Rotation Angle Sensor |
| C1531 | ECU Malfunction |
| C1532 | ECU Malfunction |
| C1533 | Temperature Sensor Circuit is Low or High |
| C1534 | EEPROM |
| C1541 | Vehicle Speed Signal |
| C1551 | IG Power Supply Voltage |
| C1552 | PIG Power Supply Voltage |
| C1554 | Power Supply Relay Failure |
| C1555 | Motor Relay Welding Failure |
| C1567 | Error in Matching of ECUs |
| C1581 | Assist Map Number Un-Writing |
| C1582 | Assist Map Number Mismatch |
| U0100 | Lost Communication with ECM / PCM "A" |
| U0126 | Lost Communication With Steering Angle Sensor Module |
| U0129 | Lost Communication with Brake System Control Module |
| U023A | Lost Communication with Front Camera Module |
| U0293 | Lost Communication with Hybrid Control Module |
POWER STEERING SYSTEM DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION [11/2023 - ]
| DTC Code | Description |
|---|---|
| C0526-96 | Steering Angle Sensor Module Component Internal Failure |
| C05D6-04 | Power Steering Control Module Processor System Internal Failure |
| C05D6-46 | Power Steering Control Module Processor Calibration / Parameter Memory Failure |
| C05D6-49 | Power Steering Control Module Processor Internal Electronic Failure |
| C1000-1C | Control Module Internal Temperature Sensor "A" Circuit Voltage Out of Range |
| C1005-1C | Control Module Internal Temperature Sensor "B" Circuit Voltage Out of Range |
| C123A-17 | Supply Voltage Circuit Circuit Voltage Above Threshold |
| C14FE-14 | Steering Angle Sensor Supply Voltage Circuit Short to Ground or Open |
| C1511-62 | Power Steering Torque Sensor "A" Signal Compare Failure |
| C1511-87 | Power Steering Torque Sensor "A" Missing Message |
| C1512-62 | Power Steering Torque Sensor "B" Signal Compare Failure |
| C1512-87 | Power Steering Torque Sensor "B" Missing Message |
| C151A-17 | Power Steering Torque Sensor "A" Supply Voltage Circuit Voltage Above Threshold |
| C151B-17 | Power Steering Torque Sensor "B" Supply Voltage Circuit Voltage Above Threshold |
| C152A-18 | Power Steering Motor "A" Circuit Current Below Threshold |
| C152A-19 | Power Steering Motor "A" Circuit Current Above Threshold |
| C152B-18 | Power Steering Motor "B" Circuit Current Below Threshold |
| C152B-19 | Power Steering Motor "B" Circuit Current Above Threshold |
| C153A-00 | Malfunction of Power Steering Motor "A" Inverter Pre-Driver |
| C153A-19 | Power Steering Motor "A" Inverter Circuit Current Above Threshold |
| C153A-9F | Power Steering Motor "A" Inverter Stuck Off |
| C153B-00 | Malfunction of Power Steering Motor "B" Inverter Pre-Driver |
| C153B-19 | Power Steering Motor "B" Inverter Circuit Current Above Threshold |
| C153B-9F | Power Steering Motor "B" Inverter Stuck Off |
| C154A-7E | Power Supply & Contrary Connection Protection Relay "A" Actuator Stuck On |
| C154A-7F | Power Supply & Contrary Connection Protection Relay "A" Actuator Stuck Off |
| C154B-7E | Power Supply & Contrary Connection Protection Relay "B" Actuator Stuck On |
| C154B-7F | Power Supply & Contrary Connection Protection Relay "B" Actuator Stuck Off |
| C155A-16 | Power Steering Motor "A" Supply Voltage Circuit Voltage Below Threshold |
| C155A-17 | Power Steering Motor "A" Supply Voltage Circuit Voltage Above Threshold |
| C155B-16 | Power Steering Motor "B" Supply Voltage Circuit Voltage Below Threshold |
| C155B-17 | Power Steering Motor "B" Supply Voltage Circuit Voltage Above Threshold |
| C156A-9E | Power Steering Motor "A" Shut Down Relay Stuck On |
| C156A-9F | Power Steering Motor "A" Shut Down Relay Stuck Off |
| C156B-9E | Power Steering Motor "B" Shut Down Relay Stuck On |
| C156B-9F | Power Steering Motor "B" Shut Down Relay Stuck Off |
| C157A-11 | Power Steering Motor "A" Current Sensor Circuit Short to Ground |
| C157A-62 | Power Steering Motor "A" Current Sensor Signal Compare Failure |
| C157B-11 | Power Steering Motor "B" Current Sensor Circuit Short to Ground |
| C157B-62 | Power Steering Motor "B" Current Sensor Signal Compare Failure |
| C159A-49 | Power Steering Motor "A" Terminal Voltage Detect Circuit Internal Electronic Failure |
| C159B-49 | Power Steering Motor "B" Terminal Voltage Detect Circuit Internal Electronic Failure |
| C15D1-62 | Power Steering Motor Position Sensor "A" Signal Compare Failure |
| C15D1-87 | Power Steering Motor Position Sensor "A" Missing Message |
| C15D2-62 | Power Steering Motor Position Sensor "B" Signal Compare Failure |
| C15D2-87 | Power Steering Motor Position Sensor "B" Missing Message |
| U0100-87 | Lost Communication with ECM/PCM "A" Missing Message |
| U0129-87 | Lost Communication with Brake System Control Module Missing Message |
| U023A-87 | Lost Communication with Image Processing Module "A" Missing Message |
| U0293-87 | Lost Communication with Hybrid/EV Powertrain Control Module Missing Message |
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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.