18-022-26

Flash: Powertrain Control Module (PCM) Updates Customers may experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle may SYMPTOM: exhibit/set one or more of the following Diagnostic Trouble Codes (DTCs):
• P121B-00 - Active Exhaust Valve 2 Performance.
• P1217-00 - Active Exhaust Valve 1 Performance. Customers may comment on the following:
• Exhaust pitch does not track with throttle input. This bulletin involves inspecting and possibly reprogramming the PCM with the latest available software.