DTC U0121:00 [Pcm (SKYACTIV-G (Us))]: Outline

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DTC U0121:00 (PCM, SKYACTIV-G, US) DETECTION CONDITION AND POSSIBLE CAUSE

System malfunction location	CAN communication: communication error to DSC HU/CM
Detection condition	Communication error between the PCM and DSC HU/CM continues for 5 s or more.
Fail-safe	Inhibits the DSC control.
Possible cause	CAN communication line malfunction between PCM and DSC HU/CM DSC HU/CM malfunction PCM malfunction
System wiring diagram	Not applicable
Connector diagram	Not applicable