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 MANUALSTOYOTA2025PRIUS PLUG-IN HYBRID XSE PREMIUMREPAIR AND DIAGNOSIS (SINGLE PAGE)GENERAL INFORMATIONDTC INDEXDTC INDEX (3 OF 3)POWER ASSIST SYSTEMS DTCSPOWER STEERING SYSTEM
2025 Toyota Prius Plug-In Hybrid XSE Premium
Power Steering System
2025 Toyota Prius Plug-In Hybrid XSE PremiumSECTION Power Steering System
POWER STEERING SYSTEM DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION [12/2022 - 03/2023]
| DTC Code | Description |
|---|---|
| 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 |
| C123A-17 | Supply Voltage Circuit Circuit Voltage Above Threshold |
| 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 |
| C153B-00 | Malfunction of Power Steering Motor "B" Inverter Pre-Driver |
| C153B-19 | Power Steering Motor "B" Inverter Circuit Current Above Threshold |
| 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 |
| C15D1-1C | Power Steering Motor Position Sensor "A" Circuit Voltage Out of Range |
| C15D1-62 | Power Steering Motor Position Sensor "A" Signal Compare Failure |
| C15D2-1C | Power Steering Motor Position Sensor "B" Circuit Voltage Out of Range |
| C15D2-62 | Power Steering Motor Position Sensor "B" Signal Compare Failure |
| C15D3-1C | Power Steering Motor Position Sensor "C" Circuit Voltage Out of Range |
| C15D3-62 | Power Steering Motor Position Sensor "C" Signal Compare Failure |
| U0126-87 | Lost Communication with Steering Angle Sensor Module 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 |
| U1110-87 | Lost Communication with Clearance Sonar Module |
POWER STEERING SYSTEM DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION [03/2023 - ]
| DTC Code | Description |
|---|---|
| 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 |
| C123A-17 | Supply Voltage Circuit Circuit Voltage Above Threshold |
| 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 |
| C153B-00 | Malfunction of Power Steering Motor "B" Inverter Pre-Driver |
| C153B-19 | Power Steering Motor "B" Inverter Circuit Current Above Threshold |
| 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 |
| C15D1-1C | Power Steering Motor Position Sensor "A" Circuit Voltage Out of Range |
| C15D1-62 | Power Steering Motor Position Sensor "A" Signal Compare Failure |
| C15D2-1C | Power Steering Motor Position Sensor "B" Circuit Voltage Out of Range |
| C15D2-62 | Power Steering Motor Position Sensor "B" Signal Compare Failure |
| C15D3-1C | Power Steering Motor Position Sensor "C" Circuit Voltage Out of Range |
| C15D3-62 | Power Steering Motor Position Sensor "C" Signal Compare Failure |
| U0126-87 | Lost Communication with Steering Angle Sensor Module 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 |
| U1110-87 | Lost Communication with Clearance Sonar 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.