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 MANUALSSCION2015FR-S AUTOMATIC TRANSREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCETESTING & DIAGNOSISENGINE CONTROL SYSTEM (DIAGNOSTIC CODES (P1603-U0073) & CIRCUIT TESTS)
2015 Scion FR-S Automatic Trans
Engine Control System (Diagnostic Codes (P1603-U0073) & Circuit Tests)
2015 Scion FR-S Automatic TransSECTION Engine Control System (Diagnostic Codes (P1603-U0073) & Circuit Tests)
- SFI System
- DTC P1603: Engine Stall History [05/2014 - ]
- DTC P1604: STARTABILITY Malfunction [05/2014 - ]
- DTC P2096: Post Catalyst Fuel Trim System Too Lean (Bank 1); DTC P2097: Post Catalyst Fuel Trim System Too Rich (Bank 1) [05/2014 - ]
- DTC P2101: Throttle Actuator Control Motor Circuit Range/Performance; DTC P2102: Throttle Actuator Control Motor Circuit Low; DTC P2103: Throttle Actuator Control Motor Circuit High [05/2014 - ]
- DTC P2122: Throttle / Pedal Position Sensor / Switch "D" Circuit Low Input; DTC P2123: Throttle / Pedal Position Sensor / Switch "D" Circuit High Input; DTC P2127: Throttle / Pedal Position Sensor / Switch "E" Circuit Low Input; DTC P2128: Throttle / Pedal Position Sensor / Switch "E" Circuit High Input; DTC P2138: Throttle / Pedal Position Sensor / Switch "D" / "E" Voltage Correlation [05/2014 - ]
- DTC P2195: Oxygen (A/F) Sensor Signal Stuck Lean (Bank 1 Sensor 1); DTC P2196: Oxygen (A/F) Sensor Signal Stuck Rich (Bank 1 Sensor 1) [05/2014 - ]
- DTC P2270: Oxygen Sensor Signal Stuck Lean (Bank 1 Sensor 2); DTC P2271: Oxygen Sensor Signal Stuck Rich (Bank 1 Sensor 2) [05/2014 - ]
- DTC P2401: Evaporative Emission System Leak Detection Pump Control Circuit Low; DTC P2402: Evaporative Emission Leak Detection Pump Stuck On; DTC P2419: Evaporative Emission System Switching Valve Control Circuit Low; DTC P2420: Evaporative Emission Pressure Switching Valve Stuck Off [05/2014 - ]
- DTC P2530: Ignition Switch Run Position Circuit [05/2014 - ]
- DTC P2610: ECM / Pcm Internal Engine Off Timer Performance [05/2014 - ]
- DTC U0073: Control Module Communication Bus "A" Off; DTC U0101: Lost Communication With TCM; DTC U0122: Lost Communication With Vehicle Dynamics Control Module; DTC U0155: Lost Communication With Instrument Panel Cluster (IPC) Control Module; DTC U0402: Invalid Data Received From TCM; DTC U0416: Invalid Data Received From Vehicle Dynamics Control Module; DTC U0423: Invalid Data Received From Instrument Panel Cluster Control Module [05/2014 - ]
- Circuit Tests
RENDER: 1.0x
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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.