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:
? P3426 - Cylinder 4 Deactivation Control Performance.
? P3402 - Cylinder 1 Deactivation Control Performance.
? P3442 - Cylinder 6 Deactivation Control Performance.
? P3450 - Cylinder 7 Deactivation Control Performance.
? 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:
? Improved Cruise Control Acceleration mode.
? Improved Multi Displacement System operation. 6-Speed Automatic 66RFE transmission (Sales Code DFP).
? Multi Displacement System function improved while in stationary mode. 6-Speed Auto Aisin AS66RC transmission (Sales Code DF3).
? Potential small improvement in fuel economy at higher altitudes.
? Potential improvement in high altitude engine idle RPM stability.
