DTC codes / Honda codes / P1706
P1706 on Honda vehicles means the transmission control module (TCM) has detected an open circuit in the automatic transmission (A/T) gear position switch circuit. The TCM monitors the switch's signal and sees no valid voltage return, so it cannot confirm which gear the shifter is in and sets this code.
Guidance is general and written for Honda vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.
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