What does code P1660 mean?

Q: What does code P1660 mean?

A/T FI Data Line Failure. P1660 on Nissan vehicles indicates that the automatic transmission (A/T) control module has detected a failure in the serial data line that carries fuel injection (FI) information between the engine control module (ECM) and the transmission control module (TCM). This line is used for torque management and shift quality, so the TCM sets the code when the expected data stream is missing, corrupted, or intermittent.

DTC codes / Nissan codes / P1660

P1660 · NissanA/T FI Data Line Failure

P1660 on Nissan vehicles indicates that the automatic transmission (A/T) control module has detected a failure in the serial data line that carries fuel injection (FI) information between the engine control module (ECM) and the transmission control module (TCM). This line is used for torque management and shift quality, so the TCM sets the code when the expected data stream is missing, corrupted, or intermittent.

SystemPowertrain

Code typeNissan specific

SeverityMedium

Fix difficultyProfessional

AreaComputer and output circuits

Guidance is general and written for Nissan vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.