Diesel Particulate Filter is expensive to install and maintain, mechanically unreliable, and the warranties are inadequate both as to time, mileage and scope of coverage California truck and business owners initiated a lawsuit against the California Air Resources Board because of exploding trucks and roadside fires, due to the CARB’s mandatory, faulty diesel particulate filters, they say. Ironically, the filters even fail at cleaning the air. The Alliance for California Business, a voluntary group whose purpose is to protect and promote business interests throughout California, says Diesel Particulate Filters have started more than 31 fires in the last two years,...