SAN JOSE, Calif. (AP) – A group of California trucking companies has filed a lawsuit against the California Air Resources Board, alleging diesel particulate filters have caused truck fires. KNTV-TV reports that a number of trucking businesses are challenging the state’s rules requiring the filters, arguing they are expensive and dangerous. They are also calling for restitution for truck repairs. The California Air Resources Board began requiring diesel particulate filters in 2007. The devices trap harmful soot produced by diesel engines. This is Alliance for California Business owner Bud Caldwell’s second lawsuit attempting to roll back the filter requirement. In March, a Glenn County judge ruled in favor of the state. Caldwell says the new lawsuit, filed in Sacramento County, has more evidence of exhaust fires than the first attempt.