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DTC codes / Nissan codes / P1605

P1605 · NissanAT Diagnostic Communication Line

P1605 on Nissan vehicles indicates that the automatic transmission (AT) control module has detected a communication fault on the diagnostic line that links it to the engine control module (ECM) or other onboard controllers. The transmission computer is not receiving or sending the expected serial data, so it sets this code and may default to a limp-home mode.

SystemPowertrain
Code typeNissan specific
SeverityMedium
Fix difficultyProfessional
AreaComputer and output circuits
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