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September 9, 2020 Service bulletin

Special Coverage Adjustment

Buick technical service bulletin N192291620 for 2016 Buick Cascada.

Bulletin number
N192291620
Component
Engine and engine cooling
Summary
Special Coverage Adjustment - certain vehicles, equipped with a 1.6L engine, may have a condition where cracks can develop in the diaphragm of the Positive Crankcase Ventilation (PCV) pressure regulator valve. This valve is a part of the engine camshaft cover. If this were to occur, excess air could be drawn into the engine intake. As a result, the engine may run rough, especially during idle, the Malfunction Indicator Light (Check Engine Light) would illuminate and a diagnostic trouble code for Fuel Trim Lean (P0171) or other airflow related DTC would set. Dealers are to replace the engine camshaft cover as necessary. The repairs will be made at no charge to the customer.

Owners of these vehicles have filed 6 complaints in the engine category.

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