Flash: Powertrain Diagnostic and System Improvements This bulletin involves reprogramming the Powertrain...

Bulletin number

18-022-17 REV. A

Component

Engine and engine cooling

Summary

Flash: Powertrain Diagnostic and System Improvements This bulletin involves reprogramming the Powertrain Control Module (PCM) with the latest available software. A small number of customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find one or more of the following DTCs set in the PCM memory: U1504 - Implausible Message Data Length Received From Steering Angle Sensor. P0128 - Thermostat Rationality. P0335 - Crankshaft Position Sensor Circuit. P0340 - Camshaft Position Sensor Circuit Bank 1 Sensor 1. U1424-00 - Implausible Engine Torque Signal Received. P1066 - Cylinder 1 Oil Supply Solenoid Valve Switch Off Time Out Of Range. P1068 - Cylinder 2 Oil Supply Solenoid Valve Switch Off Time Out Of Range. P106A - Cylinder 3 Oil Supply Solenoid Valve Switch Off Time Out Of Range. P106C - Cylinder 4 Oil Supply Solenoid Valve Switch Off Time Out Of Range. P050D - Cold Start Rough Idle. P0335 - Crankshaft Position Sensor Circuit. P1607 - PCM Internal Shutdown Timer Rationality. P0133 - O2 Sensor 1/1 Slow Response. P0456 - EVAP System Small Leak. P0480 - Cooling Fan 1 Control Circuit/Open. U0402 - Implausible Data Received From TCM. P2172 - High Airflow/Vacuum Leak Detected. P1D73 - AGS Performance. U0140 - Lost Communication With Body Control Module. P0441 - Evap Purge System Performance. P0116 - Engine Coolant Temperature Sensor 1 Performance.In addition to the DTCs above the following improvements have been made: Min spark changes to prevent catalytic converter overheating. Engine Startup Flare and Idle Surge. Improved vehicle acceleration. P1066 - Cylinder 1 Oil Supply Solenoid Valve Switch Off Time Out Of Range. P1068 - Cylinder 2 Oil Supply Solenoid Valve Switch Off Time Out Of Range. P106A - Cylinder 3 Oil Supply Solenoid Valve Switch Off Time Out Of Range. P106C - Cylinder 4 Oil Supply Solenoid Valve Switch Off Time Out Of Range. U0401 - Implausible Data Received From ECM/PCM - Signal Invalid.

Owners of these vehicles have filed 1,030 complaints in the engine category.