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 DIAGNOSISENGINE PERFORMANCETESTING & DIAGNOSISAUTO START STOP (DIAGNOSTICS)
2022 Subaru Impreza Base, 4D Sedan, Automatic CVT Trans
Auto Start Stop (Diagnostics)
2022 Subaru Impreza Base, 4D Sedan, Automatic CVT TransSECTION Auto Start Stop (Diagnostics)
- Basic Diagnostic Procedure
- Check List For Interview
- General Description
- Electrical Component Location
- Control Module I/O Signal
- Inspection Mode
- Auto Start Stop Indicator
- Diagnostic Procedure For Subaru Select Monitor Communication
- Data Monitor
- Freeze Frame Data
- Active Test
- Customize
- Work Support
- Diagnostic Trouble Code (DTC)
- Diagnostic Procedure With Diagnostic Trouble Code (DTC)
- DTC P0512: Starter (Switch) Request Circuit
- DTC P1518: Starter Switch Circuit Low
- DTC P1567: Audio Supply Voltage Monitoring Circuit Low
- DTC P1568: Audio Supply Voltage Monitoring Circuit High
- DTC P1580: Starter Relay Diagnosis Circuit
- DTC P1615: Starter Operation Number Of Times Excess
- DTC P161D: Electric Fluid Pump (CVT) Relay Circuit Low
- DTC P1625: Auto Start Request Circuit Low
- DTC P1626: Auto Start Request Circuit High
- DTC P1739: Electric Fluid Pump (CVT) Drive Circuit
- DTC P173A: Electric Fluid Pump (CVT) Status Signal
- DTC P173B: Electric Fluid Pump (CVT) Performance
- DTC P173C: Electric Fluid Pump (CVT) Status Circuit Low
- DTC P173D: Electric Fluid Pump (CVT) Status Circuit High
- DTC P173E: Electric Fluid Pump (CVT) Input Voltage
- DTC P1A15: Dc/Dc Converter 1 Boost Command Signal Low
- DTC P1A16: Dc/Dc Converter 1 Boost Command Signal High
- DTC P1A17: Dc/Dc Converter 2 Boost Command Signal Low
- DTC P1A18: Dc/Dc Converter 2 Boost Command Signal High
- DTC P1A20: Dc/Dc Converter 1 Boost Performance
- DTC P1A21: Dc/Dc Converter 1 Input 1 Voltage
- DTC P1A22: Dc/Dc Converter 1 Input 2 Voltage
- DTC P1A23: Dc/Dc Converter 1 Output 1 Voltage
- DTC P1A24: Dc/Dc Converter 1 Output 2 Voltage
- DTC P1A25: Dc/Dc Converter 1 Circuit 1 Temperature
- DTC P1A26: Dc/Dc Converter 1 Circuit 2 Temperature
- DTC P1A27: Dc/Dc Converter 1 Internal Circuit
- DTC P1A28: Dc/Dc Converter 2 Boost Performance
- DTC P1A29: Dc/Dc Converter 2 Input 1 Voltage
- DTC P1A2A: Dc/Dc Converter 2 Input 2 Voltage
- DTC P1A2B: Dc/Dc Converter 2 Output 1 Voltage
- DTC P1A2C: Dc/Dc Converter 2 Output 2 Voltage
- DTC P1A2D: Dc/Dc Converter 2 Circuit 1 Temperature
- DTC P1A2E: Dc/Dc Converter 2 Circuit 2 Temperature
- DTC P1A2F: Dc/Dc Converter 2 Internal Circuit
- DTC P1C00: Battery Monitor Module "A" Performance
- DTC P257E: Engine Hood Switch Circuit Low
- DTC P257F: Engine Hood Switch Circuit High
- DTC U0073: Control Module Communication Bus Off
- DTC U0100: Lost Communication With ECM/Pcm "A"
- DTC U0122: Lost Communication With Vehicle Dynamics Control Module
- DTC U0131: Lost Communication With Power Steering Control Module
- DTC U0140: Lost Communication With Body Control Module
- DTC U0155: Lost Communication With Instrument Panel Cluster (IPC) Control Module
- DTC U0164: Lost Communication With HVAC Control Module
- DTC U0401: Invalid Data Received From ECM/Pcm "A"
- DTC U0416: Invalid Data Received From Vehicle Dynamics Control Module
- DTC U0420: Invalid Data Received From Power Steering Control Module
- DTC U0422: Invalid Data Received From Body Control Module
- DTC U0423: Invalid Data Received From Instrument Panel Cluster Control Module
- DTC U0424: Invalid Data Received From HVAC Control Module
- DTC U1604: Lost Communication With Dc/Dc Converter Module 1
- DTC U1712: Lost Lin Communication With Battery "1" Monitor Module
- Autostart Cancel Code(S) Display
- Diagnostics With Phenomenon
- Inspection
- Trouble Symptom
- Symptom 1: Engine Does Not Stop
- Symptom 2: The Engine Stop Period Is Short
- Symptom 3: After The Engine Stops, A Buzzer Sounds And The Auto Start Stop Is Canceled
- Symptom 4: The Value Of [Voltage Drop Prohibition Evaluation At The Time Of Start] In "Data Monitor" Is [Off]
- Symptom 5: Engine Does Not Start After Stop
- Symptom 6: Auto A/C, Navigation System Or Audio Does Not Operate
- Symptom 7: Auto A/C Or Combination Meter Does Not Operate
- List Of Check Items Classified By Symptoms
- Inspection
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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.