09-017-25

Loose Charge Air Cooler Case Crimp 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):
• P219C-00 - Cylinder 1 Air-fuel Ratio Imbalance.
• P219D-00 - Cylinder 2 Air-fuel Ratio Imbalance.
• P219F-00 - Cylinder 4 Air-fuel Ratio Imbalance.
• P21A0-00 - Cylinder 5 Air-fuel Ratio Imbalance.
• P21A1-00 - Cylinder 6 Air-fuel Ratio Imbalance. Customers may experience one or more of the following:
• Audible whistle type noise heard from the engine area.
• Reduced boost to performance This bulletin involves inspecting for a crimp in the Charge Air Cooler case and possibly replacing the Charge Air Cooler.