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.
2005 Infiniti Q45FACTORY OEM SERVICE PROCEDURE
Engine Control System - DTCS P0441 To P1168
- DTC P0441: EVAP Control System
- DTC P0442: EVAP Control System
- DTC P0444, P0445: EVAP Canister Purge Volume Control Solenoid Valve
- DTC P0447: EVAP Canister Vent Control Valve
- DTC P0452: EVAP Control System Pressure Sensor
- DTC P0453: EVAP Control System Pressure Sensor
- DTC P0455: EVAP Control System
- DTC P0456: EVAP Control System
- DTC P0460: Fuel Level Sensor
- DTC P0461: Fuel Level Sensor
- DTC P0462, P0463: Fuel Level Sensor
- DTC P0500: VSS
- DTC P0506: ISC System
- DTC P0507: ISC System
- DTC P0550: PSP Sensor
- DTC P0605: ECM
- DTC P1065: ECM Power Supply
- DTC P1111, P1136: IVT Control Solenoid Valve
- DTC P1121: Electric Throttle Control Actuator
- DTC P1122: Electric Throttle Control Function
- DTC P1124, P1126: Throttle Control Motor Relay
- DTC P1128: Throttle Control Motor
- DTC P1140, P1145: IVT Control Position Sensor
- DTC P1143, P1163: Ho2S1
- DTC P1144, P1164: Ho2S1
- DTC P1146, P1166: Ho2S2
- DTC P1147, P1167: Ho2S2
- DTC P1148, P1168: Closed Loop Control
Factory Service Tools
Use the Manual With the Right Hardware
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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.