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U300C-Ignition-Input-Off/On/Start
#1

Ignition Input Off/On/Start

The Powertrain Control Module (PCM) monitors the ignition key state. The U300C code sets when the key state is not available.

Cause:
Ignition Input Off/On/Start (ISP-R) harness is open or shorted
Ignition Input Off/On/Start (ISP-R) circuit poor electrical connection

Symptoms:
Check engine light
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