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.
