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.
2016 Subaru WRX BaseFACTORY OEM SERVICE PROCEDURE
Instrumentation System/Driver Information Center DTCS
INSTRUMENTATION SYSTEM/DRIVER INFORMATION CENTER DIAGNOSTIC TROUBLE CODE (DTC) LIST
| DTC | Item | Description |
|---|---|---|
| U0073 | Control Module Communication Bus Off | < Ref. to DTC U0073 CONTROL MODULE COMMUNICATION BUS OFF , Diagnostic Procedure with Diagnostic Trouble Code (DTC). > |
| U0100 | Lost Communication With ECM/PCM "A" | < Ref. to DTC U0100 LOST COMMUNICATION WITH ECM/PCM "A" , Diagnostic Procedure with Diagnostic Trouble Code (DTC). > |
| U0101 | Lost Communication With TCM | < Ref. to DTC U0101 LOST COMMUNICATION WITH TCM , Diagnostic Procedure with Diagnostic Trouble Code (DTC). > |
| U0122 | Lost Communication With Vehicle Dynamics Control Module | < Ref. to DTC U0122 LOST COMMUNICATION WITH VEHICLE DYNAMICS CONTROL MODULE , Diagnostic Procedure with Diagnostic Trouble Code (DTC). > |
| U0128 | Lost Communication With Park Brake Control Module | < Ref. to DTC U0128 LOST COMMUNICATION WITH PARK BRAKE CONTROL MODULE , Diagnostic Procedure with Diagnostic Trouble Code (DTC). > |
| U0131 | Lost Communication With Power Steering Control Module | < Ref. to DTC U0131 LOST COMMUNICATION WITH POWER STEERING CONTROL MODULE , Diagnostic Procedure with Diagnostic Trouble Code (DTC). > |
| U0140 | Lost Communication With Body Control Module | < Ref. to DTC U0140 LOST COMMUNICATION WITH BODY CONTROL MODULE , Diagnostic Procedure with Diagnostic Trouble Code (DTC). > |
| U0151 | Lost Communication With Restraints Control Module | < Ref. to DTC U0151 LOST COMMUNICATION WITH RESTRAINTS CONTROL MODULE , Diagnostic Procedure with Diagnostic Trouble Code (DTC). > |
| U0156 | Lost Communication With Information Center "A" | < Ref. to DTC U0156 LOST COMMUNICATION WITH INFORMATION CENTER "A" , Diagnostic Procedure with Diagnostic Trouble Code (DTC). > |
| U0164 | Lost Communication With HVAC Control Module | < Ref. to DTC U0164 LOST COMMUNICATION WITH HVAC CONTROL MODULE , Diagnostic Procedure with Diagnostic Trouble Code (DTC). > |
| U0181 | Lost Communication With Headlamp Leveling Control Module | < Ref. to DTC U0181 LOST COMMUNICATION WITH HEADLAMP LEVELING CONTROL MODULE , Diagnostic Procedure with Diagnostic Trouble Code (DTC). > |
| U0327 | Software Incompatibility With Vehicle Security Control Module | < Ref. to DTC U0327 SOFTWARE INCOMPATIBILITY WITH VEHICLE SECURITY CONTROL MODULE , Diagnostic Procedure with Diagnostic Trouble Code (DTC). > |
| U1135 | Lost Communication With DCCD Control Module | < Ref. to DTC U1135 LOST COMMUNICATION WITH DCCD CONTROL MODULE , Diagnostic Procedure with Diagnostic Trouble Code (DTC). > |
| U1201 | CAN-HS Counter Abnormal | < Ref. to DTC U1201 CAN-HS COUNTER ABNORMAL , Diagnostic Procedure with Diagnostic Trouble Code (DTC). > |
| U1232 | Lost Communication With Rear/Side Radar Control Module | < Ref. to DTC U1232 LOST COMMUNICATION WITH REAR/SIDE RADAR CONTROL MODULE , Diagnostic Procedure with Diagnostic Trouble Code (DTC). > |
| U1650 | Invalid Data Received From Meter (UART) | < Ref. to DTC U1650 INVALID DATA RECEIVED FROM METER (UART) , Diagnostic Procedure with Diagnostic Trouble Code (DTC). > |
| U1651 | Lost Communication With Meter (UART) | < Ref. to DTC U1651 LOST COMMUNICATION WITH METER (UART) , Diagnostic Procedure with Diagnostic Trouble Code (DTC). > |
| B2223 | GERDA Malfunction | < Ref. to DTC B2223 GERDA MALFUNCTION , Diagnostic Procedure with Diagnostic Trouble Code (DTC). > |
| B1500 | Fuel Sender Open/Short-Circuit Detection | < Ref. to DTC B1500 FUEL SENDER OPEN/SHORT-CIRCUIT DETECTION , Diagnostic Procedure with Diagnostic Trouble Code (DTC). > |
| B1501 | Power Supply System Error Detection | < Ref. to DTC B1501 POWER SUPPLY SYSTEM ERROR DETECTION , Diagnostic Procedure with Diagnostic Trouble Code (DTC). > |
| B1507 | External Air Temperature Open/Short-Circuit Detection | < Ref. to DTC B1507 EXTERNAL AIR TEMPERATURE OPEN/SHORT-CIRCUIT DETECTION , Diagnostic Procedure with Diagnostic Trouble Code (DTC). > |
Factory Service Tools
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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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