How do I check my deadline and testing frequency?

Check each vehicle's deadline in CTC-VIS. Most covered vehicles currently follow a twice-yearly schedule; specified annual-testing categories differ. CARB's published schedule moves most OBD-tested vehicles to four tests per year beginning October 2027, while annual exceptions remain.

Use the actual vehicle record rather than a generic date calculator. Put that due date in your booking notes. A fleet's vehicles may not all have the same deadline.

Official source: CARB testing schedule.