F 350 diesel 1995 engine Where are the oxygen sensors?
A 1995 Ford F-350 diesel does not have oxygen sensors. Oxygen sensors are used to measure oxygen in the exhaust stream to control the air/fuel ratio in gasoline engines. Diesel engines don't use oxygen sensors in the same way because their combustion process doesn't rely on a precisely controlled air/fuel mixture like gasoline engines. Diesel fuel combustion is primarily controlled by the amount of fuel injected.