On Board Diagnosis Logic

WARNING: This page is about a different car, the 2004 Nissan Quest. However, it is still accessible from the selected car via links, so may be relevant.

This is not an OBD-II self-diagnostic item.
Diagnostic trouble code "ENG SPD INP PERFOR" with CONSULT-II or 14th judgement flicker without CONSULT-II is detected when malfunction is detected in engine speed signal, actual engine torque signal or torque reduction signal that is output from ECM through CAN communication.