Find official state inspection rules and map a real station near your ZIP. We do not invent a local shop list.
California (SMOG Check)
Most stringent - CARB standards. Required every 2 years or upon sale. Cost: $30-$70
Texas (TCEQ)
Required in major metro areas (DFW, Houston, Austin, etc.). Annual. Cost: $25-$40
New York
OBD-II inspection for 1996+ vehicles. Annual with safety inspection. Cost: $21-$37
No Testing Required
Many states: Alabama, Arkansas, Alaska, Florida, Iowa, Kansas, Kentucky, Michigan, Minnesota, Mississippi, Montana, Nebraska, North Dakota, Oklahoma, South Carolina, South Dakota, Wyoming
Do these before your emissions test to avoid failing:
Check Engine Light OFF
Any illuminated CEL = automatic fail
Drive 50-100 miles before test
Resets emissions monitors if battery was disconnected
Gas cap tight & sealing
Loose cap triggers EVAP codes
Oil recently changed
Dirty oil can affect emissions
Engine fully warmed up
Drive 15-20 min before test for best results
Tires properly inflated
Required for dyno testing in some states
The report lists specific codes or issues. Common: P0420 (catalytic converter), EVAP leaks, O2 sensor failures.
Fix the problem, then drive 50-100 miles to reset monitors before retesting.
Many states offer free retest within 30 days at the same station.
Many states offer waivers if you spend $450-$850+ on repairs and still fail. Check with your state's DMV for eligibility.
We do not publish a fake shop list. Use Google Maps or your stateβs official program for stations that actually exist.
Catalytic converters, O2 sensors, EVAP parts, and more β after you know the fail code.