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U0300 - Internal Control Module Software Incompatibility

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U0300 - INTERNAL CONTROL MODULE SOFTWARE INCOMPATIBILITY

Description:  The electronic throttle control (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. This DTC sets when there are incompatible software levels within the PCM that control the ETC system.
Possible Causes: 
Diagnostic Aids:  Verify the PCM is at the latest calibration level.
Application  Key On Engine Off  Key On Engine Running  Continuous Memory 
All GO to PINPOINT TEST QE: ELECTRONIC THROTTLE CONTROL (ETC) SYSTEM .
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