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 MANUALSSUBARU2012IMPREZA WRX STI F4-2.5L DOHC TURBOREPAIR AND DIAGNOSISA L L DIAGNOSTIC TROUBLE CODES ( DTC )TESTING AND INSPECTIONDIAGNOSTIC TROUBLE CODE DESCRIPTIONSDIAGNOSTIC TROUBLE CODE (DTC) DETECTING CRITERIAP CODESP2103
2012 Subaru Impreza WRX STI F4-2.5L DOHC Turbo
P2103
2012 Subaru Impreza WRX STI F4-2.5L DOHC TurboSECTION P2103
DTC P2103 THROTTLE ACTUATOR CONTROL MOTOR CIRCUIT HIGH
1. OUTLINE OF DIAGNOSIS
Judge as NG when the electronic throttle control power is supplied even when ECM sets the electronic throttle control relay to OFF.
2. COMPONENT DESCRIPTION
3. ENABLE CONDITIONS
4. GENERAL DRIVING CYCLE
- When ignition switch ON -> OFF
- Ignition switch OFF -> ON (Only after clearing memory)
5. DIAGNOSTIC METHOD
- Abnormality Judgment
If the duration of time while the following conditions are met is longer than the time indicated, judge as NG.
Time Needed for Diagnosis: 600 ms
Malfunction Indicator Light Illumination: Illuminates as soon as a malfunction occurs.
- Normality Judgment
Judge as OK and clear the NG if the continuous time while the following conditions are established is more than the predetermined time.
Time Needed for Diagnosis: 400 ms
1. OUTLINE OF DIAGNOSIS
Judge as NG when the electronic throttle control power is supplied even when ECM sets the electronic throttle control relay to OFF.
2. COMPONENT DESCRIPTION
3. ENABLE CONDITIONS
4. GENERAL DRIVING CYCLE
- When ignition switch ON -> OFF
- Ignition switch OFF -> ON (Only after clearing memory)
5. DIAGNOSTIC METHOD
- Abnormality Judgment
If the duration of time while the following conditions are met is longer than the time indicated, judge as NG.
Time Needed for Diagnosis: 600 ms
Malfunction Indicator Light Illumination: Illuminates as soon as a malfunction occurs.
- Normality Judgment
Judge as OK and clear the NG if the continuous time while the following conditions are established is more than the predetermined time.
Time Needed for Diagnosis: 400 ms
RENDER: 1.0x
NO RELATED
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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.