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Home >> Infiniti >> 2011 >> M37 Base >> Repair and Diagnosis >> Steering >> Power Steering >> Power Steering Control System (With 4WAS) -- M37/M56 >> [With 4WAS] >> DTC/Circuit Diagnosis >> DTC C1921: Engine Speed Signal >> DTC Logic >> DTC Detection Logic
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DTC Detection Logic

MALFUNCTION DETECTED CONDITION AND POSSIBLE CAUSE

DTC Display item Malfunction detected condition Possible cause
C1921 ENG REV SIGNAL Malfunction is detected in engine speed signal that is output from ECM via CAN communication.
(Improper signal is input engine speed.)		 Engine speed signal error
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