VW Tiguan on Alcohol?
This bulletin applies to 2009-2015 Volkswagen Tiguan vehicles. When diagnosing fault cod P0171, monitor MVB 32, field 2 (long term fuel trims). If fuel trims read 15-20%, take a fuel sample and check for alcohol content. If it is found necessary to pump out the tank and replace the fuel, note that all Tiguans have saddle-style fuel tanks. Both sides of the fuel tank must be pumped out as a result. Removing the rear seat will provide access to both the passenger and driver side.
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.
