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.
2023 Subaru WRX Base, Standard TransFACTORY OEM SERVICE PROCEDURE
Body Control
NOTE:
Other than for C0 model
IMMOBILIZER SYSTEM (BODY CONTROL) DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION
NOTE:
The starter relay control is performed in immobilizer system. When the body integrated unit detects a non conformity of reference code, it immediately outputs a starter relay cut signal to ECM, and then ECM stops the starter relay operation. In this case, engine does not start, and DTC is not recorded in ECM. Therefore, check DTC on the body integrated unit to identify the cause of the engine not starting.
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.