DTC codes / Mazda codes / P1701
P1701 on Mazda vehicles means the transmission control module (TCM) has detected an error in the transmission range sensor's reverse engagement signal, typically a mismatch between the sensor's reported position and the actual gear selected. The computer compares the range sensor input against expected values during reverse engagement and flags the code when the signal is implausible or absent.
Guidance is general and written for Mazda vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.
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