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 MANUALSTOYOTA2018PRIUS TWO ECOREPAIR AND DIAGNOSISENGINE PERFORMANCETESTING & DIAGNOSISENGINE CONTROL SYSTEM - DIAGNOSTIC CODES (7 OF 8)
2018 Toyota Prius Two Eco
Engine Control System - Diagnostic Codes (7 Of 8)
2018 Toyota Prius Two EcoSECTION Engine Control System - Diagnostic Codes (7 Of 8)
- SFI System
- 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 [12/2018 - ]
- DTC P148F-00: Engine Coolant Pump Over Revolution [11/2015 - ]
- DTC P1604-00: Startability Malfunction [11/2015 - ]
- DTC P1605-00: Rough Idling [11/2015 - ]
- DTC P2100-14: Throttle Actuator "A" Control Motor Circuit Short to Ground or Open; DTC P2100-15: Throttle Actuator "A" Control Motor Circuit Short to Battery or Open [11/2015 - ]
- DTC P2109-00: Throttle/Pedal Position Sensor "A" Minimum Stop Performance [11/2015 - ]
- DTC P2111-72: Throttle Actuator "A" Control System Actuator Stuck Open; DTC P2111-73: Throttle Actuator "A" Control System Actuator Stuck Closed [11/2015 - ]
- DTC P2119-00: Throttle Actuator "A" Control Throttle Body Range/Performance; DTC P2119-04: Throttle Actuator "A" Control Throttle Body Range/Performance System Internal Failure; DTC P2119-77: Throttle Actuator "A" Control Throttle Body Range/Performance Commanded Position Not Reachable [11/2015 - ]
- DTC P2135-2B: Throttle/Pedal Position Sensor/Switch "A"/"B" Voltage Correlation Signal Cross Coupled [11/2015 - ]
- DTC P2195-19: A/F (O2) Sensor Signal Biased/Stuck Lean Bank 1 Sensor 1 Circuit Current Above Threshold; DTC P2195-24: A/F (O2) Sensor Signal Biased/Stuck Lean Bank 1 Sensor 1 Signal Stuck High; DTC P2196-18: A/F (O2) Sensor Signal Biased/Stuck Rich Bank 1 Sensor 1 Circuit Current Below Threshold; DTC P2196-23: A/F (O2) Sensor Signal Biased/Stuck Rich Bank 1 Sensor 1 Signal Stuck Low [12/2018 - 07/2020]
- DTC P2195-19: A/F (O2) Sensor Signal Biased/Stuck Lean Bank 1 Sensor 1 Circuit Current Above Threshold; DTC P2195-24: A/F (O2) Sensor Signal Biased/Stuck Lean Bank 1 Sensor 1 Signal Stuck High; DTC P2196-18: A/F (O2) Sensor Signal Biased/Stuck Rich Bank 1 Sensor 1 Circuit Current Below Threshold; DTC P2196-23: A/F (O2) Sensor Signal Biased/Stuck Rich Bank 1 Sensor 1 Signal Stuck Low [07/2020 - ]
- DTC P2195-1D: O2 Sensor Signal Biased/Stuck Lean Bank 1 Sensor 1 Circuit Current Out of Range; DTC P2195-23: O2 Sensor Signal Biased/Stuck Lean Bank 1 Sensor 1 Signal Stuck Low; DTC P2196-1D: O2 Sensor Signal Biased/Stuck Rich Bank 1 Sensor 1 Circuit Current Out of Range; DTC P2196-24: O2 Sensor Signal Biased/Stuck Rich Bank 1 Sensor 1 Signal Stuck High [11/2015 - 12/2018]
- DTC P2226-11: Barometric Pressure Sensor "A" Circuit Short to Ground; DTC P2226-15: Barometric Pressure Sensor "A" Circuit Short to Battery or Open [11/2015 - ]
- DTC P2237-11: O2 Sensor Positive Current Control Bank 1 Sensor 1 Circuit Short to Ground; DTC P2237-12: O2 Sensor Positive Current Control Bank 1 Sensor 1 Circuit Short to Battery; DTC P2237-14: O2 Sensor Positive Current Control Bank 1 Sensor 1 Circuit Short to Ground or Open; DTC P2237-16: O2 Sensor Positive Current Control Bank 1 Sensor 1 Circuit Voltage Below Threshold; DTC P2237-17: O2 Sensor Positive Current Control Bank 1 Sensor 1 Circuit Voltage Above Threshold; DTC P2237-1A: O2 Sensor Positive Current Control Bank 1 Sensor 1 Circuit Resistance Below Threshold; DTC P2251-11: O2 Sensor Negative Current Control Bank 1 Sensor 1 Circuit Short to Ground; DTC P2251-12: O2 Sensor Negative Current Control Bank 1 Sensor 1 Circuit Short to Battery [11/2015 - 12/2018]
- DTC P2237-11: A/F (O2) Sensor Positive Current Control Bank 1 Sensor 1 Circuit Short to Ground; DTC P2237-12: A/F (O2) Sensor Positive Current Control Bank 1 Sensor 1 Circuit Short to Battery; DTC P2237-13: A/F (O2) Sensor Positive Current Control Bank 1 Sensor 1 Circuit Open; DTC P2237-16: A/F (O2) Sensor Positive Current Control Bank 1 Sensor 1 Circuit Voltage Below Threshold; DTC P2237-17: A/F (O2) Sensor Positive Current Control Bank 1 Sensor 1 Circuit Voltage Above Threshold; DTC P2237-1B: A/F (O2) Sensor Positive Current Control Bank 1 Sensor 1 Circuit Resistance Above Threshold; DTC P2251-11: O2 Sensor Negative Current Control Bank 1 Sensor 1 Circuit Short to Ground; DTC P2251-12: O2 Sensor Negative Current Control Bank 1 Sensor 1 Circuit Short to Battery [12/2018 - 07/2020]
- DTC P2237-11: A/F (O2) Sensor Positive Current Control Bank 1 Sensor 1 Circuit Short to Ground; DTC P2237-12: A/F (O2) Sensor Positive Current Control Bank 1 Sensor 1 Circuit Short to Battery; DTC P2237-13: A/F (O2) Sensor Positive Current Control Bank 1 Sensor 1 Circuit Open; DTC P2237-16: A/F (O2) Sensor Positive Current Control Bank 1 Sensor 1 Circuit Voltage Below Threshold; DTC P2237-17: A/F (O2) Sensor Positive Current Control Bank 1 Sensor 1 Circuit Voltage Above Threshold; DTC P2237-1B: A/F (O2) Sensor Positive Current Control Bank 1 Sensor 1 Circuit Resistance Above Threshold; DTC P2251-11: O2 Sensor Negative Current Control Bank 1 Sensor 1 Circuit Short to Ground; DTC P2251-12: O2 Sensor Negative Current Control Bank 1 Sensor 1 Circuit Short to Battery [07/2020 - ]
- DTC P2418-7F: Evaporative Emission System Switching Valve Control Circuit Actuator Stuck Off [11/2015 - ]
- DTC P2450-7E: Evaporative Emission System Switching Valve Actuator Stuck On; DTC P2451-7F: Evaporative Emission System Switching Valve Actuator Stuck Off [11/2015 - ]
- DTC P2610-29: ECM/PCM Engine Off Timer Performance Signal Invalid; DTC P2610-93: ECM/PCM Engine Off Timer Performance No Operation [11/2015 - ]
- DTC P261A-12: Coolant Pump "B" Circuit Short to Battery; DTC P261A-14: Coolant Pump "B" Circuit Short to Ground or Open [11/2015 - 07/2020]
- DTC P261A-12: Coolant Pump "B" Circuit Short to Battery; DTC P261A-14: Coolant Pump "B" Circuit Short to Ground or Open [07/2020 - ]
- DTC P261A-13: Coolant Pump "B" Circuit Open [11/2015 - ]
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.