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Home >> Lincoln >> 2012 >> MKZ Hybrid >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 38 (Engine Controls (Except Diesel & Hybrid) - Powertrain DTC Descriptions - DTC P1703 - P2A04, DTC PXXXX, DTC U0046 - U300C, DTC UXXXX) >> DTC U300C: Ignition Input Off/On/Start

DTC U300C: Ignition Input Off/On/Start

WARNING: This page is about a different variant/trim than selected.
U300C - IGNITION INPUT OFF/ON/START

Description:  The PCM monitors the ignition key state. This DTC sets when the key state is not available.
Possible Causes: 
  • ISP-R circuit open
  • ISP-R circuit short to ground
Diagnostic Aids: 
Application  Key On Engine Off  Key On Engine Running  Continuous Memory 
All GO to PINPOINT TEST B .