DTC codes / Volkswagen codes / P1704
P1704 on Volkswagen vehicles means the transmission control module (TCM) has detected an implausible or missing signal from the kick-down switch, which is the sensor that tells the computer you have pressed the accelerator pedal fully past its normal travel. The TCM uses this switch to trigger a forced downshift for maximum acceleration, and when the signal is absent or stuck it logs the fault and may disable the kick-down function.
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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