The 2009 Ford F-150 bank 1 sensor 1 can be found close to the ventilation system on the driver's side of the motor in front of the exhaust system. This sensor will be introduced on the exhaust funneling into a bung and have a wire that is emerging from its rear. Your O2 sensors are utilized to gauge the fumes gasses to decide how the motor is running. They give their data Your truck's ECU and that permits it to change the fuel and air depending on the situation to keep the air to fuELRatio running great. At the point when You notice that Your truck is running unpleasant,or smells like running exceptionally rich is generally an indication of a terrible O2 sensor on Your fumes.