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 MANUALSSUBARU2022IMPREZA BASE, 4D SEDAN, AUTOMATIC CVT TRANSREPAIR AND DIAGNOSIS (SINGLE PAGE)BRAKESTRACTION CONTROLELECTRIC BRAKE BOOSTER SYSTEM (DIAGNOSTICS)
2022 Subaru Impreza Base, 4D Sedan, Automatic CVT Trans
Electric Brake Booster System (Diagnostics)
2022 Subaru Impreza Base, 4D Sedan, Automatic CVT TransSECTION Electric Brake Booster System (Diagnostics)
- Basic Diagnostic Procedure
- Check List for Interview
- General Description
- Electrical Component Location
- Control Module I/O Signal
- Warning Light Illumination Pattern
- Diagnostic Procedure for Subaru Select Monitor Communication
- Data Monitor
- Freeze Frame Data
- Work Support
- Diagnostic Trouble Code (DTC)
- Diagnostic Procedure with Diagnostic Trouble Code (DTC)
- DTC P0572 Brake Switch "A" Circuit Low
- DTC P0573 Brake Switch "A" Circuit High
- DTC P057C Brake Pedal Position Sensor "A" Circuit Low
- DTC P057D Brake Pedal Position Sensor "A" Circuit High
- DTC P057E Brake Pedal Position Sensor "A" Circuit Intermittent/Erratic
- DTC P05DD Brake Pedal Position Sensor "B" Circuit Low
- DTC P05DE Brake Pedal Position Sensor "B" Circuit High
- DTC P05DF Brake Pedal Position Sensor "B" Circuit Intermittent/Erratic
- DTC P05E0 Brake Pedal Position Sensor "A"/"B" Correlation
- DTC C0501 Left Front Wheel Speed Sensor Range/Performance
- DTC C0502 Left Front Wheel Speed Sensor Circuit Low
- DTC C0503 Left Front Wheel Speed Sensor Circuit High
- DTC C0504 Left Front Wheel Speed Sensor Intermittent/Erratic
- DTC C0507 Right Front Wheel Speed Sensor Range/Performance
- DTC C0508 Right Front Wheel Speed Sensor Circuit Low
- DTC C0509 Right Front Wheel Speed Sensor Circuit High
- DTC C050A Right Front Wheel Speed Sensor Intermittent/Erratic
- DTC C050D Left Rear Wheel Speed Sensor Range/Performance
- DTC C050E Left Rear Wheel Speed Sensor Circuit Low
- DTC C050F Left Rear Wheel Speed Sensor Circuit High
- DTC C0510 Left Rear Wheel Speed Sensor Intermittent/Erratic
- DTC C0513 Right Rear Wheel Speed Sensor Range/Performance
- DTC C0514 Right Rear Wheel Speed Sensor Circuit Low
- DTC C0515 Right Rear Wheel Speed Sensor Circuit High
- DTC C0516 Right Rear Wheel Speed Sensor Intermittent/Erratic
- DTC C0562 Brake Pedal Position Sensor Supply Voltage Circuit/Open
- DTC C0594 Brake Booster Motor "A" Performance
- DTC C0597 Brake System Control Module "A" Performance
- DTC C1A09 Brake Fluid Pressure Sensor 1 Supply Voltage
- DTC C1A0A Brake Fluid Pressure Sensor 1 Lost Communication
- DTC C1A0B Brake Fluid Pressure Sensor 1 Out Of Range
- DTC C1A0C Brake Fluid Pressure Sensor 1 Zero Position
- DTC C1A0D Brake Fluid Pressure Sensor 1 Intermittent/Erratic
- DTC C1A0E Brake Fluid Pressure Sensor 1 Invalid Data
- DTC C1A0F Brake Fluid Pressure Sensor 1 Correlation
- DTC C1A19 Brake Fluid Pressure Sensor 2 Supply Voltage
- DTC C1A1A Brake Fluid Pressure Sensor 2 Lost Communication
- DTC C1A1B Brake Fluid Pressure Sensor 2 Out Of Range
- DTC C1A1D Brake Fluid Pressure Sensor 2 Intermittent/Erratic
- DTC C1A1E Brake Fluid Pressure Sensor 2 Invalid Data
- DTC C1A29 Brake Fluid Pressure Sensor 3 Supply Voltage
- DTC C1A2A Brake Fluid Pressure Sensor 3 Lost Communication
- DTC C1A2B Brake Fluid Pressure Sensor 3 Out Of Range
- DTC C1A2C Brake Fluid Pressure Sensor 3 Zero Position
- DTC C1A2D Brake Fluid Pressure Sensor 3 Intermittent/Erratic
- DTC C1A2E Brake Fluid Pressure Sensor 3 Invalid Data
- DTC C1A3D Right Front Wheel Speed Sensor Range/Performance (2 Wheels Simultaneous)
- DTC C1A3E Right Front Wheel Speed Sensor Supply Voltage
- DTC C1A3F VDC Right Front Wheel Speed Sensor
- DTC C1A4D Left Front Wheel Speed Sensor Range/Performance (2 Wheels Simultaneous)
- DTC C1A4E Left Front Wheel Speed Sensor Supply Voltage
- DTC C1A4F VDC Left Front Wheel Speed Sensor
- DTC C1A5D Right Rear Wheel Speed Sensor Range/Performance (2 Wheels Simultaneous)
- DTC C1A5E Right Rear Wheel Speed Sensor Supply Voltage
- DTC C1A5F VDC Right Rear Wheel Speed Sensor
- DTC C1A6D Left Rear Wheel Speed Sensor Range/Performance (2 Wheels Simultaneous)
- DTC C1A6E Left Rear Wheel Speed Sensor Supply Voltage
- DTC C1A6F VDC Left Rear Wheel Speed Sensor
- DTC C1A7E Brake Pedal Position Sensor Invalid Data
- DTC C1A7F Brake Pedal Position Sensor Calibration Not Initialized
- DTC C1AFF Brake System Component Performance
- DTC C1B0D Solenoid Valve Sub Relay Circuit
- DTC C1B0E Solenoid Valve Main Relay Circuit Low
- DTC C1B0F Solenoid Valve Main Relay Circuit High
- DTC C1B1C Solenoid Valve 1 Range/Performance
- DTC C1B1D Solenoid Valve 1 Circuit Low
- DTC C1B1E Solenoid Valve 1 Circuit High
- DTC C1B1F Solenoid Valve 1 Stuck
- DTC C1B2C Solenoid Valve 2 Range/Performance
- DTC C1B2D Solenoid Valve 2 Circuit Low
- DTC C1B2E Solenoid Valve 2 Circuit High
- DTC C1B3C Solenoid Valve 3 Range/Performance
- DTC C1B3D Solenoid Valve 3 Circuit Low
- DTC C1B3E Solenoid Valve 3 Circuit High
- DTC C1B3F Solenoid Valve 3 Stuck
- DTC C1B4C Solenoid Valve 4 Range/Performance
- DTC C1B4D Solenoid Valve 4 Circuit Low
- DTC C1B4E Solenoid Valve 4 Circuit High
- DTC C1B4F Solenoid Valve 4 Stuck
- DTC C1B5D Motor Control Circuit
- DTC C1B5E Motor Relay Control Circuit Low
- DTC C1B5F Motor Relay Control Circuit High
- DTC C1B6E Accumulator Pressure Stuck
- DTC C1B6F Accumulator Pressure Too Low
- DTC C1BFF Solenoid Valve Calibration Not Initialized
- DTC C1C00 Reservoir Level Switch Circuit Open
- DTC C1C01 Reservoir Level Too Low
- DTC C1C20 Supply Voltage Low
- DTC C1C21 Supply Voltage High
- DTC C1C2E Solenoid Valve Supply Voltage Low
- DTC C1C2F Solenoid Valve Supply Voltage High
- DTC C1C30 IG1 Circuit Low
- DTC C1C31 IG2 Circuit Low
- DTC C1C40 Brake Ecu
- DTC C1C50 HPCM Control System
- DTC C1C51 HPCM Regenerative Brake Control System
- DTC C1C52 VDC Driving Assist
- DTC C1C53 VDC Control System
- DTC C1C54 VDC Supply Voltage
- DTC C1C60 Not Initializing
- DTC C1C61 Hydraulic Control Increasing Too Late
- DTC C1C62 Hydraulic Control Decreasing Too Late
- DTC C1C63 One Hydraulic Path Failure
- DTC C1C6F Accumulator Pressure Leak
- DTC U0075 Control Module Communication Bus "PU-Can" Off
- DTC U0078 Control Module Communication Bus "GC-Can" Off
- DTC U0110 Lost Communication With Drive Motor Control Module "A"
- DTC U0140 Lost Communication With Body Control Module
- DTC U0293 Lost Communication With Hybrid Powertrain Control Module
- DTC U1100 Lost Communication With ECM/Pcm PU-Can
- DTC U1107 Software Incompatibility With Vehicle Security Control Module
- DTC U1122 Lost Communication With Vehicle Dynamics Control Module C-Can
- DTC U128E LOST COMMUNICATION WITH EyeSight C-CAN
- DTC U1416 Invalid Data Received From Vehicle Dynamics Control Module C-Can
- DTC U158F INVALID DATA RECEIVED FROM EyeSight C-CAN
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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.