How many oxygen sensors are on a 2004 f-150?

A 2004 Ford F-150 typically has four oxygen sensors: two upstream (pre-catalytic converter) and two downstream (post-catalytic converter). However, the exact number can vary depending on the engine configuration. The 4.6L and 5.4L V8 engines are the most common, each having this sensor arrangement. Always refer to the vehicle’s service manual for specific details.