California started requiring diesel cars and truck to get a smog check in
this year (2010). All diesel cars and trucks 1998 and newer, and weighing
under 14,500 GVW now need a diesel smog check inspection. The diesel smog
test does not include the emissions test portion which gasoline powered
vehicle have to take. No tailpipe emissions are measured, and your diesel
car will not be driven on a dynamometer during the diesel smog test.
Instead the diesel smog check will check all the visual emissions components
of your vehicle. The diesel smog test will check the On Board Diagnostics
(OBD II) system. And, the diesel smog test will include a visual smoke check
for excessive black smoke (smoke), plus a EVAP functional test.
