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.
2015 Subaru WRX STI Launch EditionFACTORY OEM SERVICE PROCEDURE
Inspection Mode: Procedure: Notes
Perform the diagnosis shown in the following DTC table.
When performing the diagnosis not listed in "List of Diagnostic Trouble Code (DTC)", refer to the item on the drive cycle. <Ref. to DRIVE CYCLE .>
| DTC | Item | Condition |
|---|---|---|
| B1570 | Antenna | - |
| B1571 | Reference Code Incompatibility | - |
| B1572 | IMM Circuit Failure (Except Antenna Circuit) | - |
| B1574 | Key Communication Failure | - |
| B1575 | Incorrect Immobilizer Key | - |
| B1576 | EGI Control Module EEPROM | - |
| B1577 | IMM Control Module EEPROM | - |
| B1578 | Meter Failure | - |
| P0016 | Crankshaft Position - Camshaft Position Correlation (Bank1) | - |
| P0017 | Crank and Cam Timing B System Failure (Bank 1) | - |
| P0018 | Crankshaft Position - Camshaft Position Correlation (Bank2) | - |
| P0019 | Crank and Cam Timing B System Failure (Bank 2) | - |
| P0031 | HO2S Heater Control Circuit Low (Bank 1 Sensor 1) | - |
| P0032 | HO2S Heater Control Circuit High (Bank 1 Sensor 1) | - |
| P0037 | HO2S Heater Control Circuit Low (Bank 1 Sensor 2) | - |
| P0038 | HO2S Heater Control Circuit High (Bank 1 Sensor 2) | - |
| P0072 | Ambient Temperature Sensor Circuit "A" Low | - |
| P0073 | Ambient Temperature Sensor Circuit "A" High | - |
| P0102 | Mass or Volume Air Flow Circuit Low Input | - |
| P0103 | Mass or Volume Air Flow Circuit High Input | - |
| P0107 | Manifold Absolute Pressure/Barometric Pressure Circuit Low Input | - |
| P0108 | Manifold Absolute Pressure/Barometric Pressure Circuit High Input | - |
| P0112 | Intake Air Temperature Sensor 1 Circuit Low | - |
| P0113 | Intake Air Temperature Sensor 1 Circuit High | - |
| P0117 | Engine Coolant Temperature Circuit Low | - |
| P0118 | Engine Coolant Temperature Circuit High | - |
| P0122 | Throttle/Pedal Position Sensor/Switch "A" Circuit Low | - |
| P0123 | Throttle/Pedal Position Sensor/Switch "A" Circuit High | - |
| P0131 | O2 Sensor Circuit Low Voltage (Bank 1 Sensor 1) | - |
| P0132 | O2 Sensor Circuit High Voltage (Bank 1 Sensor 1) | - |
| P0201 | Injector #1 | - |
| P0202 | Injector #2 | - |
| P0203 | Injector #3 | - |
| P0204 | Injector #4 | - |
| P0222 | Throttle/Pedal Position Sensor/Switch "B" Circuit Low | - |
| P0223 | Throttle/Pedal Position Sensor/Switch "B" Circuit High | - |
| P0230 | Fuel Pump Primary Circuit | - |
| P0245 | Turbo/Super Charger Wastegate Solenoid "A" Low | - |
| P0327 | Knock Sensor 1 Circuit Low (Bank 1 or Single Sensor) | - |
| P0328 | Knock Sensor 1 Circuit High (Bank 1 or Single Sensor) | - |
| P0335 | Crankshaft Position Sensor "A" Circuit | - |
| P0336 | Crankshaft Position Sensor "A" Circuit Range/Performance | - |
| P0340 | Camshaft Position Sensor "A" Circuit (Bank 1 or Single Sensor) | - |
| P0341 | Camshaft Position Sensor "A" Circuit Range/Performance (Bank 1 or Single Sensor) | - |
| P0345 | Camshaft Position Sensor "A" Circuit (Bank 2) | - |
| P0346 | Camshaft Position Sensor "A" Circuit Range/Performance (Bank 2) | - |
| P0351 | Ignition Coil A Primary/Secondary Circuit | - |
| P0352 | Ignition Coil B Primary/Secondary Circuit | - |
| P0353 | Ignition Coil C Primary/Secondary Circuit | - |
| P0354 | Ignition Coil D Primary/Secondary Circuit | - |
| P0365 | Camshaft Position Sensor "B" Circuit (Bank 1) | - |
| P0366 | Camshaft Position Sensor B Circuit Range/Performance (Bank 1) | - |
| P0390 | Camshaft Position Sensor "B" Circuit (Bank 2) | - |
| P0391 | Camshaft Position Sensor B Circuit Range/Performance (Bank 2) | - |
| P0413 | Secondary Air Injection System Switching Valve "A" Circuit Open | - |
| P0416 | Secondary Air Injection System Switching Valve "B" Circuit Open | - |
| P0452 | Evaporative Emission System Pressure Sensor/Switch Low | - |
| P0453 | Evaporative Emission System Pressure Sensor/Switch High | - |
| P0458 | Evaporative Emission System Purge Control Valve Circuit Low | - |
| P0462 | Fuel Level Sensor "A" Circuit Low | - |
| P0463 | Fuel Level Sensor "A" Circuit High | - |
| P04AC | EVAP System Purge Control Valve "B" Circuit Low | - |
| P04DB | Crankcase Ventilation System Disconnected | - |
| P0512 | Starter Request Circuit | - |
| P0560 | System Voltage | - |
| P0604 | Internal Control Module Random Access Memory (RAM) Error | - |
| P0605 | Internal Control Module Read Only Memory (ROM) Error | - |
| P0606 | Control Module Processor | - |
| P060A | Internal Control Module Monitoring Processor Performance | - |
| P060B | Internal Control Module A/D Processing Performance | - |
| P0616 | Starter Relay Circuit Low | - |
| P0617 | Starter Relay Circuit High | - |
| P062F | Internal Control Module EEPROM Error | - |
| P0685 | ECM/PCM Power Relay Control Circuit/Open | - |
| P081A | Starter Disable Circuit Low | - |
| P1160 | Return Spring Failure | - |
| P2008 | Intake Manifold Runner Control Circuit/Open (Bank 1) | - |
| P2009 | Intake Manifold Runner Control Circuit Low (Bank 1) | - |
| P2011 | Intake Manifold Runner Control Circuit/Open (Bank 2) | - |
| P2012 | Intake Manifold Runner Control Circuit Low (Bank 2) | - |
| P2016 | Tumble Generated Valve Position Sensor 1 Circuit Low | - |
| P2017 | Tumble Generated Valve Position Sensor 1 Circuit High | - |
| P2021 | Tumble Generated Valve Position Sensor 2 Circuit Low | - |
| P2022 | Tumble Generated Valve Position Sensor 2 Circuit High | - |
| P2088 | Intake Camshaft Position Actuator Control Circuit Low (Bank 1) | - |
| P2089 | Intake Camshaft Position Actuator Control Circuit High (Bank 1) | - |
| P2090 | Exhaust Camshaft Position Actuator Control Circuit Low (Bank 1) | - |
| P2091 | Exhaust Camshaft Position Actuator Control Circuit High (Bank 1) | - |
| P2092 | Intake Camshaft Position Actuator Control Circuit Low (Bank 2) | - |
| P2093 | Intake Camshaft Position Actuator Control Circuit High (Bank 2) | - |
| P2094 | Exhaust Camshaft Position Actuator Control Circuit Low (Bank 2) | - |
| P2095 | Exhaust Camshaft Position Actuator Control Circuit High (Bank 2) | - |
| P2101 | Throttle Actuator Control Motor Circuit Range/Performance | - |
| P2102 | Throttle Actuator Control Motor Circuit Low | - |
| P2103 | Throttle Actuator Control Motor Circuit High | - |
| P2109 | Throttle/Pedal Position Sensor "A" Minimum Stop Performance | - |
| P2119 | Throttle Actuator Control Throttle Body Range/Performance | - |
| P2122 | Throttle/Pedal Position Sensor/Switch "D" Circuit Low Input | - |
| P2123 | Throttle/Pedal Position Sensor/Switch "D" Circuit High Input | - |
| P2127 | Throttle/Pedal Position Sensor/Switch "E" Circuit Low Input | - |
| P2128 | Throttle/Pedal Position Sensor/Switch "E" Circuit High Input | - |
| P2135 | Throttle/Pedal Position Sensor/Switch "A"/"B" Voltage Correlation | - |
| P2138 | Throttle/Pedal Position Sensor/Switch "D"/"E" Voltage Correlation | - |
| P2257 | Air System Control "A" Circuit Low | - |
| P2401 | Evaporative Emission System Leak Detection Pump Control Circuit Low | - |
| P2419 | Evaporative Emission System Switching Valve Control Circuit Low | - |
| P2432 | Secondary Air Injection System Air Flo/ressure Sensor Circuit Low | - |
| P2433 | Secondary Air Injection System Air Flo/ressure Sensor Circuit High | - |
| P2444 | Secondary Air Injection System Pump Stuck On | - |
| P2530 | Ignition Switch Run Position Circuit | - |
| U0073 | Control Module Communication Bus Off | - |
| U0122 | CAN (VDC) Data Not Loaded | - |
| U0155 | Lost Communication With Instrument Panel Cluster (IPC) Control Module | - |
| U0416 | CAN (VDC) Data Abnormal | - |
| U0423 | Invalid Data Received From Instrument Panel Cluster Control Module | - |
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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