1806417

Flash: Powertrain Diagnostic and System Improvements This bulletin involves reprogramming the Powertrain Control Module (PCM) with the latest available software. Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find that the following DTCs has been set:U1424 - Implausible Engine Torque Signal Received. U0402 - Implausible Data Received From TCM. P1DD2-00 - Torque Request Signal From TCM Denied. P0128 - Thermostat Rationality. Enhancement also included:Improved calibrations for catalyst overtemp protection.