08-194-26

Flash: Ignition System Control Module (ISCM) Updates Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must exhibit/set one or more of the following Diagnostic Trouble Codes (DTCs):
• P2C30-00 - Ignition Coil Primary Circuit Fuse A.
• P2C31-00 - Ignition Coil Primary Circuit Fuse B.
• P0300-00 - Multiple Cylinder Misfire.
• P0301-00 - Cylinder 1 Misfire Detected.
• P0302-00 - Cylinder 2 Misfire Detected.
• P0303-00 - Cylinder 3 Misfire Detected.
• P0304-00 - Cylinder 4 Misfire Detected.
• P0305-00 - Cylinder 5 Misfire.
• P0306-00 - Cylinder 6 Misfire.
• P0420-00 - Catalyst System Efficiency Below Threshold Bank 1.
• P0430-00 - Catalyst System Efficiency Below Threshold Bank 2. Customers may also comment on the following:
• Engine hesitates/misfires This bulletin involves inspecting and possibly reprogramming the ISCM and the Powertrain Control Module (PCM) with the latest available software.