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.
2016 Scion tC Automatic TransFACTORY OEM SERVICE PROCEDURE
Engine Control System (Diagnostic Codes (P0420-P1605))
- SFI System
- DTC P0420: Catalyst System Efficiency Below Threshold (Bank 1) [05/2014 - ]
- DTC P043E: Evaporative Emission System Leak Detection Reference Orifice Low Flow; DTC P043F: Evaporative Emission System Reference Orifice High Flow; DTC P2401: Evaporative Emission Leak Detection Pump Stuck Off; DTC P2402: Evaporative Emission Leak Detection Pump Stuck On; DTC P2419: Evaporative Emission System Switching Valve Control Circuit Low [05/2014 - ]
- DTC P0441: Evaporative Emission Control System Incorrect Purge Flow [05/2014 - ]
- DTC P0451: Evaporative Emission Control System Pressure Sensor Range / Performance; DTC P0452: Evaporative Emission Control System Pressure Sensor / Switch Low Input; DTC P0453: Evaporative Emission Control System Pressure Sensor / Switch High Input [05/2014 - ]
- DTC P0455: Evaporative Emission Control System Leak Detected (Gross Leak); DTC P0456: Evaporative Emission Control System Leak Detected (Very Small Leak) [05/2014 - ]
- DTC P0500: Vehicle Speed Sensor "A" [05/2014 - ]
- DTC P0504: Brake Switch "A" / "B" Correlation [05/2014 - ]
- DTC P0505: Idle Control System Malfunction [05/2014 - ]
- DTC P050A: Cold Start Idle Air Control System Performance [05/2014 - ]
- DTC P050B: Cold Start Ignition Timing Performance [05/2014 - ]
- DTC P0560: System Voltage [05/2014 - ]
- DTC P0604: Random Access Memory (Ram) [05/2014 - ]
- DTC P0606: ECM / Pcm Processor [05/2014 - ]
- DTC P0607: Control Module Performance [05/2014 - ]
- DTC P060A: Internal Control Module Monitoring Processor Performance [05/2014 - ]
- DTC P060B: Internal Control Module A/D Processing Performance [05/2014 - ]
- DTC P060D: Internal Control Module Accelerator Pedal Position Performance [05/2014 - ]
- DTC P060E: Internal Control Module Throttle Position Performance [05/2014 - ]
- DTC P0617: Starter Relay Circuit High [05/2014 - ]
- DTC P062F: Internal Control Module EEPROM Error [05/2014 - ]
- DTC P0630: VIN Not Programmed Or Mismatch - ECM / Pcm [05/2014 - ]
- DTC P0657: Actuator Supply Voltage Circuit / Open [05/2014 - ]
- DTC P0705: Transmission Range Sensor Circuit Malfunction (PRNDL Input) [05/2014 - ]
- DTC P0724: Brake Switch "B" Circuit High [05/2014 - ]
- DTC P1603: Engine Stall History; DTC P1605: Rough Idling [05/2014 - ]
Factory Service Tools
Use the Manual With the Right Hardware
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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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