U0300 (Pcm) - Internal Control Module Software Incompatibility
WARNING: This page is about a different car, the 2014 Lincoln MKZ, 2014 Ford Fusion, and 2014 Ford C-Max. However, it is still accessible from the selected car via links, so may be relevant.
U0300 (PCM) - INTERNAL CONTROL MODULE SOFTWARE INCOMPATIBILITY
| Description: | This DTC sets when there are incompatible software levels within the PCM that control the electronic throttle control (ETC) monitor system. The ETC monitor 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. | ||
| 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 QF: ELECTRONIC THROTTLE CONTROL (ETC) SYSTEM . | ||