08-087-25

"Flash: Ignition System Control Module (ISCM) Updates Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle mustexhibit/set one or more of the following Diagnostic Trouble Codes (DTCs):
• 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 misfires.
• Damage to catalyst. This bulletin involves inspecting and possibly reprogramming the ISCM and the Powertrain Control Module (PCM) with the latest available software."