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 Toyota Prius TwoFACTORY OEM SERVICE PROCEDURE
Engine Control System (Diagnostic Codes & Circuit Tests) (Except Plug-In)
- SFI System
- DTC P106A: Evaporative Emission System Pressure Sensor - Manifold Absolute Pressure Correlation [10/2013 - ]
- DTC P148F: Engine Coolant Pump Over Revolution [10/2013 - ]
- DTC P2102: Throttle Actuator Control Motor Circuit Low; DTC P2103: Throttle Actuator Control Motor Circuit High [10/2013 - ]
- DTC P2111: Throttle Actuator Control System - Stuck Open; DTC P2112: Throttle Actuator Control System - Stuck Closed [10/2013 - ]
- DTC P2118: Throttle Actuator Control Motor Current Range / Performance [10/2013 - ]
- DTC P2119: Throttle Actuator Control Throttle Body Range / Performance [10/2013 - ]
- 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) [10/2013 - ]
- DTC P219A: Bank 1 Air-Fuel Ratio Imbalance; DTC P219C: Cylinder 1 Air-Fuel Ratio Imbalance; DTC P219D: Cylinder 2 Air-Fuel Ratio Imbalance; DTC P219E: Cylinder 3 Air-Fuel Ratio Imbalance; DTC P219F: Cylinder 4 Air-Fuel Ratio Imbalance [10/2013 - ]
- DTC P2237: Oxygen (A/F) Sensor Pumping Current Circuit / Open (Bank 1 Sensor 1); DTC P2238: Oxygen (A/F) Sensor Pumping Current Circuit Low (Bank 1 Sensor 1); DTC P2239: Oxygen (A/F) Sensor Pumping Current Circuit High (Bank 1 Sensor 1); DTC P2252: Oxygen (A/F) Sensor Reference Ground Circuit Low (Bank 1 Sensor 1); DTC P2253: Oxygen (A/F) Sensor Reference Ground Circuit High (Bank 1 Sensor 1) [10/2013 - ]
- DTC P2420: Evaporative Emission System Switching Valve Control Circuit High [10/2013 - ]
- DTC P2610: ECM / PCM Internal Engine Off Timer Performance [10/2013 - ]
- DTC P261B: Engine Coolant Pump "B" Control Malfunction; DTC P261C: Engine Coolant Pump "B" Control Circuit Low; DTC P261D: Engine Coolant Pump "B" Control Circuit High [10/2013 - ]
- DTC P3190: Poor Engine Power; DTC P3191: Engine does not Start [10/2013 - ]
- DTC P3193: Fuel Run Out [10/2013 - ]
- DTC U0293: Lost Communication with HV ECU [10/2013 - ]
- Circuit Tests
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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