DTC codes / Volkswagen codes / P1733
P1733 on Volkswagen vehicles means the Transmission Control Module (TCM) has detected a short to ground on the Tiptronic downshift switch circuit. The TCM monitors the voltage on the signal wire from the manual gate downshift switch and sees it pulled to ground when the switch is not commanded, indicating a wiring fault or failed switch.
Guidance is general and written for Volkswagen vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.
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