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Home >> Nissan-Datsun >> 2021 >> NV2500 HD S >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 7 (Automatic Transmission (DTC/Circuit Diagnosis) (Re7R01B)) >> DTC/Circuit Diagnosis >> DTC P1721: Vehicle Speed Signal >> DTC Description >> Notes

DTC Description: Notes

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The vehicle speed signal is transmitted from combination meter to TCM via CAN communication line. The signal functions as an auxiliary device to the output speed sensor when it is malfunctioning. The TCM will then use the vehicle speed signal.