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 P1211 To P2138
- DTC P1211: TCS Control Unit
- DTC P1212: TCS Communication Line
- DTC P1217: Engine Over Temperature
- DTC P1220: Fuel Pump Control Module (FPCM)
- DTC P1225: TP Sensor
- DTC P1226: TP Sensor
- DTC P1229: Sensor Power Supply
- DTC P1442: EVAP Control System
- DTC P1444: EVAP Canister Purge Volume Control Solenoid Valve
- DTC P1446: EVAP Canister Vent Control Valve
- DTC P1448: EVAP Canister Vent Control Valve
- DTC P1456: EVAP Control System
- DTC P1490: Vacuum Cut Valve Bypass Valve
- DTC P1491: Vacuum Cut Valve Bypass Valve
- DTC P1564: ICC Steering Switch
- DTC P1564: ASCD Steering Switch
- DTC P1568: ICC Function
- DTC P1572: ICC Brake Switch
- DTC P1572: ASCD Brake Switch
- DTC P1574: ICC Vehicle Speed Sensor
- DTC P1574: ASCD Vehicle Speed Sensor
- DTC P1706: PNP Switch
- DTC P1715: Input Speed Sensor (Turbine Revolution Sensor)
- DTC P1720: VSS
- DTC P1780: Shift Change Signal
- DTC P1800: VIAS Control Solenoid Valve
- DTC P1805: Brake Switch
- DTC P2122, P2123: App Sensor
- DTC P2127, P2128: App Sensor
- DTC P2135: TP Sensor
- DTC P2138: App Sensor
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.
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.