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.
Air Conditioning System (Except Plug-In) (Diagnostic Codes & Circuit Tests)
2012 Toyota Prius ThreeSECTION Air Conditioning System (Except Plug-In) (Diagnostic Codes & Circuit Tests)
- Air Conditioning System
- DTC B1411/11: Room Temperature Sensor Circuit
- DTC B1412/12: Ambient Temperature Sensor Circuit
- DTC B1413/13: Evaporator Temperature Sensor Circuit
- DTC B1423/23: Pressure Sensor Circuit
- DTC B1441/41: Air Mix Damper Control Servo Motor Circuit (Passenger Side)
- DTC B1442/42: Air Inlet Damper Control Servo Motor Circuit
- DTC B1443/43: Air Outlet Damper Control Servo Motor Circuit
- DTC B1471/71: A/C Inverter High Voltage Power Resource System Malfunction
- DTC B1472/72: A/C Inverter High Voltage Output System Malfunction
- DTC B1473/73: A/C Inverter Start-up Signal System Malfunction
- DTC B1474/74: A/C Inverter Malfunction
- DTC B1475/75: A/C Inverter Cooling / Heating System Malfunction
- DTC B1476/76: A/C Inverter Load System Malfunction
- DTC B1477/77: A/C Inverter Low Voltage Power Resource System Malfunction
- DTC B1497/97: BUS IC Communication Malfunction
- DTC B1498/98: Communication Malfunction (A/C Inverter Local)
- DTC B14A2: Driver Side Solar Sensor Short Circuit
- DTC P0AA6-611: Hybrid Battery Voltage System Isolation Fault
- DTC U0100: Lost Communication with ECM; DTC U0131: Lost Communication with Electric Power Steering ECU; DTC U0142: Lost Communication with Main Body ECU; DTC U0155: Lost Communication with Combination Meter; 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.