The Common Cause: A Missed Motorhome Declaration When a vehicle is first added to a Clean Truck Check account, the owner (or whoever sets up the account) must explicitly declare the vehicle as a motorhome  by checking the appropriate box in the system. If that box is not checked , the CARB system automatically treats the vehicle as a commercial diesel truck . That single oversight can trigger incorrect testing requirements. What Happens When the Box Isn’t Checked If the vehic

Understanding California's Clean Truck Check for Motorhomes California's Clean Truck Check program requires certain heavy-duty vehicles,...

Mobile Service for OBD and Opacity Testing When it comes to emissions testing, particularly opacity tests, it’s important to understand...

Below are notes from CARB regarding testing Background During the initial phase of the Clean Truck Check program in 2023, only vehicles...