What does code P1677 mean?

Q: What does code P1677 mean?

Traction Control System FI Data Line Failure. P1677 on Nissan vehicles indicates a failure in the serial data communication line between the traction control system (TCS) module and the engine control module (ECM). The ECM has detected that the expected fuel injection (FI) data signal from the TCS is missing or corrupted, which can disable traction control and illuminate the warning light.

DTC codes / Nissan codes / P1677

P1677 · NissanTraction Control System FI Data Line Failure

P1677 on Nissan vehicles indicates a failure in the serial data communication line between the traction control system (TCS) module and the engine control module (ECM). The ECM has detected that the expected fuel injection (FI) data signal from the TCS is missing or corrupted, which can disable traction control and illuminate the warning light.

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.