Possible causes

– Faulty Direct Clutch Solenoid Valve
– Direct Clutch Solenoid Valve harness is open or shorted
– Direct Clutch Solenoid Valve circuit poor electrical connection

Symptoms

– Engine Light ON (or Service Engine Soon Warning Light)

P1764 INFINITI Description

Direct clutch solenoid valve is controlled by the Transmission Control Module (TCM) in response to signals sent from the PNP switch, vehicle speed sensor and accelerator pedal position sensor (throttle position sensor). Gears will then be shifted to the optimum position.

INFINITI Technical Service Bulletins for P1764 code