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.
2017 Subaru WRX BaseFACTORY OEM SERVICE PROCEDURE
Diagnostic Trouble Code (DTC): Operation
WARNING: This page is about a different car, the 2022 Subaru WRX. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
- For detailed operation procedures, refer to "COMMON (DIAGNOSTICS)". Ref. to COMMON (DIAGNOSTICS)>DIAGNOSTIC TROUBLE CODE (DTC)
- For details on DTCs, refer to the list. Ref. to ENGINE (DIAGNOSTICS) (H4DOTC)>DIAGNOSTIC TROUBLE CODE (DTC)>LIST
- Up to 11 DTCs are stored. When malfunctions exceeding the maximum number are detected, they are stored based on the priority order described in the table below.
Priority Diagnosis type MIL output GST output Confirmed malfunction/Temporary malfunction 1 Misfire, fuel system, sub F/B correction amount diagnosis ON Yes Confirmed malfunction 2 Temporary malfunction 3 Other than above ON Yes Confirmed malfunction 4 Temporary malfunction 5 OFF Yes Confirmed malfunction 6 Temporary malfunction 7 OFF No Confirmed malfunction 8 Temporary malfunction - DTCs are cleared if the battery is removed.
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.