EGR P0404 code accelerating. 2005 Buick Terraza
For this code, there is a related technical service bulletin (https://www.yourmechanic.com/article/how-to-use-a-technical-service-bulletin-by-parker-hill) 06-06-04-003D (http://workshop-manuals.com/buick/terraza_awd/v6-3.5l_vin_l/powertrain_management/prom_programmable_read_only_memory/component_information/technical_service_bulletins/customer_interest/06-06-04-003d/) dated March 20,2007. The TSB calls for installing a new EGR kit consisting of a new valve, tube, and wire connector, and directions to reprogram the powertrain...