Guide
Do mobile mechanics do smog checks in California? No — here is why, and what we can do
No. In California a Smog Check can only be performed by a licensed smog technician at a licensed station, inside a building — a mobile mechanic is not allowed to do one, anywhere. What a mobile mechanic can do is find and fix the fault that would fail it, so you arrive at the station ready.
Updated 2026-08-22 · Frank's Mobile Mechanic 24/7
The rule
California's Smog Check program (Health and Safety Code §44014 and §44032; 16 CCR §3340.15) requires the inspection to be done by a licensed technician at a licensed Smog Check station with the state's equipment, in a building. A mobile service does not meet that, so anyone offering a "mobile smog check" is offering something that does not exist legally.
What a mobile mechanic can do
A check-engine light fails the test before the tailpipe is even measured, so the useful job is upstream: read the codes and the live data, find the actual fault (a sensor, a coil, a vacuum leak, a loose cap), fix it, and make sure the car's readiness monitors have run. That we do in your driveway.
Then you go to a licensed station for the official Smog Check. We are not one, we do not pretend to be, and we do not sell a "pre-smog" anything — just the diagnosis that makes the real test pass.
