There is a Factory Service Bulletin for the 2005 Infiniti G35 with 5-Speed A/T RE5R05A Transmission:
2005 Infiniti G35 RE5R05A Transmission Factory Service Bulletin OBDII Code P1754
Check the 'Possible Causes' listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.
The cost to diagnose the P1754 2005 Infiniti G35 code is 1.0 hour of labor. The diagnosis time and labor rates at auto repair shops vary depending on the location, make and model of the vehicle, and even the engine type. Most auto repair shops charge between $75 and $150 per hour.
The Input Clutch Solenoid Valve is controlled by the Transmission Control Module (TCM) in response to signals sent from the Park & Neutral Position (PNP) Switch, Vehicle Speed Sensor (VSS), and Accelerator Pedal Position (APP) Sensor (Throttle Position Sensor). Gears will then be shifted to the optimum position. This is not only caused by electrical malfunction (circuits open or shorted) but also by mechanical malfunction such as control valve sticking, improper solenoid valve operation. The Diagnostic Trouble Code (DTC) will set when the Input Clutch Solenoid Valve does not respond from the TCM signal.
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