Service Repair

Buick LaCrosse May Have Dust Intrusion

Dec. 28, 2020

This bulletin applies to 2017-2018 Buick LaCrosse vehicles. The SES light may be on. DTC P0446 may be stored.

This bulletin applies to 2017-2018 Buick LaCrosse vehicles. The SES light may be on. DTC P0446 may be stored.

This code may have been set due to dust intrusion into the EVAP canister through the air inlet pipe.

Clean filters in the air inlet to EVAP, clean the line and replace the canister. The inlet pipe with filter housing is attached to the fuel inlet pipe with zip ties.

Disconnect the air inlet pipe from the EVAP canister. Remove the cover from the air inlet housing. Remove both filters from the air inlet and blow dust out of the filters with compressed air.

About the Author

Information courtesy of Mitchell 1

Information for Technical Service Bulletins comes from ProDemand, Mitchell 1's auto repair information software for domestic and import vehicles. Headquartered in San Diego, Mitchell 1 has provided quality repair information solutions to the automotive industry since 1918.

About the Author

Mike Mavrigian | Motor Age Editor

Mike Mavrigian has written thousands of automotive technical magazine articles involving a variety of specialties, from engine building to wheel alignment, and has authored more than a dozen books that crisscross the automotive spectrum. Mike operates Birchwood Automotive, an Ohio shop that builds custom engines and performs vintage vehicle restorations. The shop also features a professional photo studio to document projects and to create images for articles and books.