A tail light inspection is not part of the smog check in California. You may pass the smog inspection even if your vehicle's tail lights are inoperable. Obviously we don't recommend driving without properly functioning tail lamps, but none the less, they will not cause you to fail the smog test. Just ensure, the check engine light (CEL) or
malfunction indicator lamp (MIL) on the dashboard is not illuminated while your vehicle's engine is running. The CEL and MIL are the only "lights" which do have an affect on smog check results. Also, if you're going to have your
smog check done in Agoura Hills, remember to use a coupon from our site. You'll get the discount plus a free online diagnosis in case your vehicle fails for any reason.