1810216

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 have been set: U0140 - Lost Communication With Body Control Module. P0441 - EVAP Purge System Performance. P0420 - Catalyst Efficiency (Bank 1). P0430 - Catalyst Efficiency (Bank 2). P0133 - O2 Sensor 1/1 Slow Response. P0153 - O2 Sensor 2/1 Slow Response. P0300 - Multiple Cylinder Misfire. P0301 - Cylinder 1 Misfire. P0302 - Cylinder 2 Misfire. P0303 - Cylinder 3 Misfire. P0304 - Cylinder 4 Misfire. P0305 - Cylinder 5 Misfire. P0306 - Cylinder 6 Misfire. P113D - O2 Sensor 1/1 Slow Response (High Frequency). P113E - O2 Sensor 2/1 Slow Response (High Frequency). P0108 - Manifold Absolute Pressure Sensor Circuit High. P0606 - Internal Control Processor. P0204 - Fuel Injector 4 Circuit/Open.In addition, the customer may notice the following conditions: 1 - 2 upshift clunk or bump. 4 - 5 upshift clunk or bump. 5 - 6 upshift clunk or bump. 6 - 5 downshift clunk or bump. 6 - 4 downshift clunk or bump. RPM fluctuating or jerking feeling while operating in cruise control. Condition is more noticeable when the vehicle is going up and down grades. A less than desired idle speed after performing a hard braking maneuver.