Flash: Diagnostic And System Enhancements
This bulletin involves reprogramming the Powertrain Control Module (PCM) with updated
software.
During normal diagnostics a technician may find one or more of the following Diagnostic
Trouble Codes (DTCs) present.
? U0140 Lost Communication With Body Control Module. (Attempting to clear this
DTC will be unsuccessful.)
? P030X Cylinder X Misfire Detected
? P0300 Multiple Cylinder Misfire Detected
Additionally the following enhancements have been implemented.
? Potential small improvement in fuel economy at higher altitudes.
? Potential improvement in high altitude engine idle RPM stability.
