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.
Section 41 (Engine Control System (Plug-In) (Diagnostic Codes (P0505-U0293) & Circuit Tests))
2012 Toyota Prius ThreeSECTION Section 41 (Engine Control System (Plug-In) (Diagnostic Codes (P0505-U0293) & Circuit Tests))
WARNING: This page is about a different variant/trim than selected.
- SFI System
- DTC P0505: Idle Control System Malfunction
- DTC P050A: Cold Start Idle Air Control System Performance
- DTC P050B: Cold Start Ignition Timing Performance
- DTC P0560: System Voltage
- DTC P0604: Random Access Memory (RAM)
- DTC P0606: ECM / PCM Processor
- DTC P0607: Control Module Performance
- DTC P060A: Internal Control Module Monitoring Processor Performance
- DTC P060B: Internal Control Module A/D Processing Performance
- DTC P060E: Internal Control Module Throttle Position Performance
- DTC P062F: Internal Control Module EEPROM Error
- DTC P0630: VIN not Programmed or Mismatch - ECM / PCM
- DTC P0657: Actuator Supply Voltage Circuit / Open
- DTC P106A: Evaporative Emission System Pressure Sensor - Manifold Absolute Pressure Correlation
- DTC P1420: Evaporative Emission Canister Small Leak; DTC P1421: Evaporative Emission Canister Gross Leak
- DTC P1422: Fuel Tank Small Leak; DTC P1423: Fuel Tank Gross Leak
- DTC P1451: Fuel Tank Pressure Sensor Range/Performance; DTC P1452: Fuel Tank Pressure Sensor Low Input; DTC P1453: Fuel Tank Pressure Sensor High Input
- DTC P148F: Engine Coolant Pump Over Revolution
- DTC P2102: Throttle Actuator Control Motor Circuit Low; DTC P2103: Throttle Actuator Control Motor Circuit High
- DTC P2111: Throttle Actuator Control System - Stuck Open; DTC P2112: Throttle Actuator Control System - Stuck Closed
- DTC P2118: Throttle Actuator Control Motor Current Range / Performance
- DTC P2119: Throttle Actuator Control Throttle Body Range / Performance
- 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)
- DTC P219A: Bank 1 Air-Fuel Ratio Imbalance
- 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)
- DTC P2420: Evaporative Emission System Switching Valve Control Circuit High
- DTC P2450: Fuel Vapor-containment Valve Stuck Open; DTC P2451: Fuel Vapor-containment Valve Stuck Close
- DTC P2610: ECM / PCM Internal Engine Off Timer Performance
- 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
- DTC P3190: Poor Engine Power; DTC P3191: Engine does not Start; DTC P3193: Fuel Run Out
- DTC U0293: Lost Communication with HV ECU
- Circuit Tests
RENDER: 1.0x
NO RELATED
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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.