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Service bulletins for the 2015 Buick Encore

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

1461 on file from NHTSA, as of 2026-10-19.

About P0446 on the 2015 Buick Encore: what the code means, and the bulletins and recalls about the same components.

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Only bulletins with trouble code: P0446 are shown. Show all

Bulletins, newest first
17NA3832018-06-11. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL. This technical bulletin provides a procedure to replace the evap canister for vehicles with the condition of Malfunction Indicator Lamp (MIL) Illuminated with DTC P0446 or P0455 Set due to spiders laying a nest within the canister.
PIC6250B2017-08-15. Service bulletin. ENGINE; EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. This Preliminary Information communication provides information to the technician about vehicles that have a check engine light. Technician will find Diagnostic Trouble Code P0446. Technician will need to replace the Evaporative Emissions System canister if spider nesting in the fresh air inlet port.
PIC6250A2017-08-15. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL; ENGINE AND ENGINE COOLING:EXHAUST SYSTEM. This Preliminary Information communication provides information to the technician about vehicles that have a check engine light. Technician will find Diagnostic Trouble Code P0446. Technician will need to replace the Evaporative Emissions System canister if spider nesting in the fresh air inlet port.
PIC62502017-08-15. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL; ENGINE AND ENGINE COOLING. This Preliminary Information communication provides information to the technician about vehicles that have a check engine light. Technician will find Diagnostic Trouble Code P0446. Technician will need to replace the Evaporative Emissions System canister if spider nesting in the fresh air inlet port.

The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.