Buick Trouble May Be Intake or Exhaust Leak
This bulletin applies to 2000-2019 Buick vehicles equipped with a gasoline engine. The SES light may be on.
Initial diagnosis may reveal any of the following fuel trim and/or O2 sensor related codes: P0101, P0137, P0138, P0140, P0141, P0157, P0158, P0160, P0161, P0171, P0174, P0420, P0430, P1174, P1175, P2096. P2097, P2098, P2099, P2177, P2178, P2179, P2180, P2187, P2188, P2189. P2190, P2270, P2271, P2272 and/or P2273.
If normal diagnosis does not lead to a resolution, and an intake vacuum leak or an exhaust leak is suspected, the use of J41413-200 Evaporative System Tester smoke machine or the J-41416 ultrasonic leak tester (or possibly using soapy water and low air pressure into the tailpipe) may be useful.
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.
Mike MavrigianMike 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.
