DTC codes / Nissan codes / P1773
P1773 on Nissan vehicles indicates that the Transmission Control Module (TCM) has detected a general malfunction within the automatic transmission system, often related to the valve body or its electrical components. The TCM monitors signals from sensors and solenoids and sets this code when the expected electrical or hydraulic response is not achieved, triggering the warning light.
Guidance is general and written for Nissan vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.
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