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U0300 - Internal Control Module Software Incompatibility

U0300 - INTERNAL CONTROL MODULE SOFTWARE INCOMPATIBILITY

Description:  This DTC indicates that there are incompatible software levels within the powertrain control module (PCM) that control the electronic throttle control (ETC) system. The ETC system uses 3 different microprocessors within the PCM, each having its own software level and function. The 3 microprocessors must have the correct level of software in order to communicate and function together.
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 - - refer to PINPOINT TEST QE .
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