U300C - Ignition Input Off/On/Start

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3  What does this mean?

Possible causes

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

Possible symptoms

  • Engine Light ON (or Service Engine Soon Warning Light)

U300c Description

The Powertrain Control Module (PCM) monitors the ignition key state. The U300C code sets when the key state is not available.
OBDII Code U300c - Ignition Input Off/On/Start - Engine-Codes.com

U300C Information for specific makes

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