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.
2014 Scion tC Automatic TransFACTORY OEM SERVICE PROCEDURE
Engine Control System (Diagnostic Codes (P0420-P0657))
- SFI System
- DTC P0420: Catalyst System Efficiency Below Threshold (Bank 1) [05/2013 - ]
- 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 [05/2013 - 01/2014]
- 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 [01/2014 - ]
- DTC P0441: Evaporative Emission Control System Incorrect Purge Flow [05/2013 - 01/2014]
- DTC P0441: Evaporative Emission Control System Incorrect Purge Flow [01/2014 - ]
- 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 [05/2013 - 01/2014]
- 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 [01/2014 - ]
- DTC P0455: Evaporative Emission Control System Leak Detected (Gross Leak); DTC P0456: Evaporative Emission Control System Leak Detected (Very Small Leak) [05/2013 - 01/2014]
- DTC P0455: Evaporative Emission Control System Leak Detected (Gross Leak); DTC P0456: Evaporative Emission Control System Leak Detected (Very Small Leak) [01/2014 - ]
- DTC P0500: Vehicle Speed Sensor "A" [05/2013 - 01/2014]
- DTC P0500: Vehicle Speed Sensor "A" [01/2014 - ]
- DTC P0504: Brake Switch "A" / "B" Correlation [05/2013 - ]
- DTC P0505: Idle Control System Malfunction [05/2013 - 01/2014]
- DTC P0505: Idle Control System Malfunction [01/2014 - ]
- DTC P050A: Cold Start Idle Air Control System Performance [05/2013 - 01/2014]
- DTC P050A: Cold Start Idle Air Control System Performance [01/2014 - ]
- DTC P050B: Cold Start Ignition Timing Performance [05/2013 - 01/2014]
- DTC P050B: Cold Start Ignition Timing Performance [01/2014 - ]
- DTC P0560: System Voltage [05/2013 - 01/2014]
- DTC P0560: System Voltage [01/2014 - ]
- DTC P0604: Random Access Memory (RAM) [05/2013 - 01/2014]
- DTC P0604: Random Access Memory (RAM) [01/2014 - ]
- DTC P0606: ECM / PCM Processor [05/2013 - 01/2014]
- DTC P0606: ECM / PCM Processor [01/2014 - ]
- DTC P0607: Control Module Performance [05/2013 - 01/2014]
- DTC P0607: Control Module Performance [01/2014 - ]
- DTC P060A: Internal Control Module Monitoring Processor Performance [05/2013 - 01/2014]
- DTC P060A: Internal Control Module Monitoring Processor Performance [01/2014 - ]
- DTC P060B: Internal Control Module A/D Processing Performance [05/2013 - 01/2014]
- DTC P060B: Internal Control Module A/D Processing Performance [01/2014 - ]
- DTC P060D: Internal Control Module Accelerator Pedal Position Performance [05/2013 - 01/2014]
- DTC P060D: Internal Control Module Accelerator Pedal Position Performance [01/2014 - ]
- DTC P060E: Internal Control Module Throttle Position Performance [05/2013 - 01/2014]
- DTC P060E: Internal Control Module Throttle Position Performance [01/2014 - ]
- DTC P0617: Starter Relay Circuit High [05/2013 - 01/2014]
- DTC P0617: Starter Relay Circuit High [01/2014 - ]
- DTC P062F: Internal Control Module EEPROM Error [05/2013 - 01/2014]
- DTC P062F: Internal Control Module EEPROM Error [01/2014 - ]
- DTC P0630: VIN not Programmed or Mismatch - ECM / PCM [05/2013 - 01/2014]
- DTC P0630: VIN not Programmed or Mismatch - ECM / PCM [01/2014 - ]
- DTC P0657: Actuator Supply Voltage Circuit / Open [05/2013 - 01/2014]
- DTC P0657: Actuator Supply Voltage Circuit / Open [01/2014 - ]
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.
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.
Rather have a pro handle this?
A certified mobile mechanic comes to your home or office. They bring the tools, you stay comfortable. No tow truck, no waiting room, no surprises.
Comes to youSame-day available12-month warranty
Get a Free QuoteNo obligation. See pricing before you book.