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.
2020 Subaru Outback BaseFACTORY OEM SERVICE PROCEDURE
Instrumentation System (Diagnostics)
- Basic Diagnostic Procedure
- Check List for Interview
- General Description
- Electrical Component Location
- Control Module I/O Signal
- Inspection Mode
- Diagnostic Procedure for Subaru Select Monitor Communication
- Data Monitor
- Freeze Frame Data
- Active Test
- Customize
- Diagnostic Trouble Code (DTC)
- Diagnostic Procedure with Diagnostic Trouble Code (DTC)
- DTC B1500: Fuel Sender Open Detected
- DTC B1501: Power Supply System Error Detection
- DTC B1502: Warning Box Communication Malfunction
- DTC B1503: Meter Control Module Can Register Stuck
- DTC B1507: Outside Temperature Sensor Open Detected
- DTC B1509: Cockpit Control Signal Input
- DTC U0074: Control Module Communication Bus "Body-Can" Off
- DTC U0100: Lost Communication With ECM/Pcm "A"
- DTC U0101: Lost Communication With TCM
- DTC U0122: Lost Communication With Vehicle Dynamics Control Module
- DTC U0127: Lost Communication With Tire Pressure Monitor Control Module And/Or Keyless Entry Control Module
- DTC U0128: Lost Communication With Park Brake Control Module
- DTC U0129: Lost Communication With Brake System Control Module
- DTC U0131: Lost Communication With Power Steering Control Module
- DTC U0141: Lost Communication With Body Control Module "A"
- DTC U0151: Lost Communication With Restraints Control Module
- DTC U0181: Lost Communication With Headlamp Leveling Control Module
- DTC U0327: Software Incompatibility With Vehicle Security Control Module
- DTC U1120: Lost Communication With AUTOSTART Stop Control Module
- DTC U1140: Lost Communication With Body Control Module Body-Can
- DTC U1232: Lost Communication With Rear/Side Radar Control Module
- DTC U123A: Lost Communication With Driver Monitoring System
- DTC U1283: Lost Communication With Eyesight SA-Bus
- DTC U143A: Invalid Data Received From Driver Monitoring System
- DTC U1533: Invalid Data Received From Rear/Side Radar Control Module
- DTC U1584: Invalid Data Received From Eyesight SA-Bus
- Diagnostics with Phenomenon
Factory Service Tools
Use the Manual With the Right Hardware
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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.
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