If a catalytic converter is removed on any car that was made after 1994, there will be problems with emission controls. Discover how the oxygen sensor will get messed up when removing a catalytic converter in some cars with help from an ASE-certified mechanic in this free video on auto repair and car performance. Expert: Tom Brintzenhofe Bio: Tom Brintzenhofe has been a mechanic for more than 17 years. Filmmaker: Reel Media LLC