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.
2021 Toyota Prius LE AWD-eFACTORY OEM SERVICE PROCEDURE
Engine Control System - Diagnostic Codes (6 Of 8)
- SFI System
- DTC P05A0-74: Active Grille Air Shutter "A" Actuator Slipping [12/2018 - ]
- DTC P05A2-11: Active Grille Air Shutter "A" Circuit Short to Ground; DTC P05A2-12: Active Grille Air Shutter "A" Circuit Short to Battery; DTC P05A2-13: Active Grille Air Shutter "A" Circuit Open [11/2015 - ]
- DTC P05A2-7E: Active Grille Air Shutter "A" Actuator Stuck On; DTC P05A2-7F: Active Grille Air Shutter "A" Actuator Stuck Off [11/2015 - ]
- DTC P05B1-12: Active Grille Air Shutter "B" Circuit Short to Battery; DTC P05B1-14: Active Grille Air Shutter "B" Circuit Short to Ground or Open; DTC P05B1-31: Active Grille Air Shutter "B" No Signal [11/2015 - ]
- DTC P0604-44: Internal Control Module Random Access Memory (RAM) Error Data Memory Failure [11/2015 - ]
- DTC P0606-47: Control Module Processor Watchdog/Safety MCU Failure [11/2015 - ]
- DTC P0607-96: Control Module Performance Bank 1 Component Internal Failure [11/2015 - ]
- DTC P060A-47: Internal Control Module Monitoring Processor Performance Watchdog/Safety MCU Failure [11/2015 - ]
- DTC P060B-49: Internal Control Module A/D Processing Performance Internal Electronic Failure [11/2015 - ]
- DTC P060E-49: Internal Control Module Throttle Position Performance Internal Electronic Failure [11/2015 - ]
- DTC P062F-44: Internal Control Module EEPROM Data Memory Failure [11/2015 - 11/2017]
- DTC P062F-44: Internal Control Module EEPROM Data Memory Failure [11/2017 - 12/2018]
- DTC P062F-44: Internal Control Module EEPROM Data Memory Failure [12/2018 - ]
- DTC P0630-51: VIN Not Programmed [11/2015 - ]
- DTC P0657-14: Actuator Supply Voltage "A" Circuit Short to Ground or Open [11/2015 - ]
- DTC P0657-9E: Actuator Supply Voltage "A" Stuck On [11/2015 - ]
- DTC P106A-62: Evaporative Emission System Pressure / Intake Air Pressure Signal Compare Failure [11/2015 - 11/2017]
- DTC P106A-62: Evaporative Emission System Pressure / Intake Air Pressure Signal Compare Failure [11/2017 - 12/2018]
- DTC P106A-62: Evaporative Emission System Pressure / Intake Air Pressure Signal Compare Failure; DTC P106C-62: Evaporative Emission System Pressure/Barometric Pressure Signal Compare Failure [12/2018 - ]
- DTC P10AA-00: Clogged EGR Port Imbalance Bank1; DTC P219A-00: Bank 1 Air-Fuel Ratio Imbalance; DTC P219C-00: Cylinder 1 Air-Fuel Ratio Imbalance; DTC P219D-00: Cylinder 2 Air-Fuel Ratio Imbalance; DTC P219E-00: Cylinder 3 Air-Fuel Ratio Imbalance; DTC P219F-00: Cylinder 4 Air-Fuel Ratio Imbalance [11/2015 - 12/2018]
- DTC P10AA-00: Clogged EGR Port Imbalance Bank1; DTC P219A-00: Bank 1 Air-Fuel Ratio Imbalance; DTC P219C-00: Cylinder 1 Air-Fuel Ratio Imbalance; DTC P219D-00: Cylinder 2 Air-Fuel Ratio Imbalance; DTC P219E-00: Cylinder 3 Air-Fuel Ratio Imbalance; DTC P219F-00: Cylinder 4 Air-Fuel Ratio Imbalance [12/2018 - ]
- DTC P1420-00: Evaporative Emission Canister (Small Leak); DTC P1421-00: Evaporative Emission Canister (Gross Leak) [11/2015 - ]
- DTC P1422-00: Evaporative Emission Fuel Tank (Small Leak); DTC P1423-00: Evaporative Emission Fuel Tank (Gross Leak) [11/2015 - ]
- DTC P1450-11: Fuel Tank Pressure Sensor Circuit Short to Ground; DTC P1450-15: Fuel Tank Pressure Sensor Circuit Short to Battery or Open; DTC P1450-2A: Fuel Tank Pressure Sensor Signal Stuck in Range; DTC P1450-2F: Fuel Tank Pressure Sensor Signal Erratic [11/2015 - 12/2018]
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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