Diesel engines: 2013 and newer
These engines fall within CARB’s OBD testing group. Use the engine’s emissions control label to identify its model year. Have that engine information and the VIN ready; the truck’s registration year can differ.
SERVICES · THE RIGHT TEST
Mobile OBD Clean Truck Check testing in Texas.
Mobile OBD emissions testing for eligible California-bound trucks in San Antonio and Austin. Review engine eligibility, readiness and test submission.
No travel surcharge. Free retesting within our working service area.
Appointments confirmed before arrival.
TEXAS / CLEAN TRUCK CHECKThe truck comes first.
Mobile OBD Clean Truck Check testing
Our certified technician provides OBD emissions testing for eligible California-bound vehicles in San Antonio and Austin. The service uses the vehicle’s on-board diagnostics data; it is separate from a Texas vehicle inspection or DOT safety inspection.
Alternative-fuel engines: 2018 and newer
These engines also fall within the OBD testing group. Examples of alternative fuels include natural gas and propane. Battery-electric and hydrogen zero-emission vehicles are excluded from this program; confirm the fuel type and engine year when booking.
OBD testing only. We do not offer smoke opacity testing or non-OBD visual inspections. Vehicles outside the OBD group may need a different CARB process and another provider. Check the official testing requirements and vehicle coverage and exclusions.
What the testing appointment covers
OBD scan and test submission
The appointment covers the OBD emissions-data test and submission through CARB’s required device process. Ask for a test record identifying the VIN, date and result.
Your vehicle account
The owner remains responsible for reporting the vehicle, paying the annual program fee and meeting outstanding requirements. Review the result for the correct VIN in CTC-VIS. A service receipt is not a substitute for that record.
Before an OBD appointment
Tell the operator about recent repairs, a replaced or disconnected battery, or cleared fault codes. The vehicle may need additional operation before its diagnostic assessment is ready. Clearing codes immediately before testing can prevent a passing result.
Have the truck parked safely with access to its diagnostic port. The truck must be available for the physical device connection. A VIN sent by email or an ordinary diagnostic screenshot does not replace the emissions test. Review CARB’s test-results and readiness guidance if you have a recent repair or an unresolved result.
OBD / EMISSIONS DATA
Eligible engines.
One OBD service.
Confirm the engine model year and fuel type before booking an OBD test. Our service does not include opacity testing or non-OBD inspections.
Compare test pricingTesting questions
Is an ordinary truck diagnostic scan enough?
No. The OBD compliance process uses a CARB-certified test device and the required submission system. A repair-shop scan can serve a different purpose.
Do you offer smoke opacity testing?
No. This business offers OBD Clean Truck Check testing only. Black-smoke artwork illustrates trucks and exhaust; it does not represent an opacity-testing service or diagnose a vehicle.
What is the difference between Not Ready and Fail?
Not Ready means the vehicle has not completed the required diagnostic assessment after a code clear; it cannot pass yet. Fail identifies an unsuccessful test that may need repairs. Use the actual result message to plan the next step. Retests are free within our working service area.
What if no result appears in CTC-VIS?
Tell the tester and have the submission investigated. Check the correct VIN; do not treat the receipt as a substitute for an official result. CARB’s result-message guidance explains communication and submission issues.
Who performs the OBD test?
Our certified technician performs the attended Clean Truck Check OBD test and submits the results through the required CARB process. You receive a vehicle-specific test record.
Are retests free?
Yes. Retests are free within our working service area. Repairs are separate; contact us to arrange the return appointment.
Book an OBD appointment for an eligible truck.
Have the VIN, engine model year, fuel type and location ready. Compare OBD rates and free-retest terms or prepare a multi-truck visit.
Request a testing appointment