U0300 - Internal Control Module Software Incompatibility

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3   
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Possible causes

  • Reprogram Module ("Flashing")
  • New Powertrain Control Module (PCM) Needs programming

Tech notes

Verify the Powertrain Control Module (PCM) is at the latest calibration level.

Possible symptoms

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

U0300 Description

The U0300 code indicates there are incompatible software levels within the Powertrain Control Module (PCM) that control the Electronic Throttle Control (ETC) system. The ETC system uses multiple microprocessors within the PCM, each having its own software level and function. The microprocessors must have the correct level of software in order to communicate and function together.
OBDII Code U0300 - Internal Control Module Software Incompatibility - AutoCodes.com

U0300 Information for specific makes

  • U0300 FORD Internal Control Module Software Incompatibility
  • U0300 LINCOLN Internal Control Module Software Incompatibility
  • U0300 MERCURY Internal Control Module Software Incompatibility

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U0300 Comments

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