How to Replace the Passenger-Side Oxygen Sensor on a Ford F250


Chances are that eventually the oxygen sensor in your Ford F-250 will go bad and need replaced. The oxygen sensor is responsible for regulating the oxygen to fuel ratio in your vehicle. It senses when more or less oxygen is needed in the fuel lines and pumps in the oxygen as needed. It also contributes to your gas mileage efficiency. If the oxygen sensor goes bad, your Ford may run poorly and get poor gas mileage as well.

Things You'll Need

  • 7/8 inch wrench
  • Crimp connectors
  • Anti-seize paste
  • WD-40


  • Locate your Ford's oxygen sensor on the pre-catalytic converter. This is located near the front right wheel well of the vehicle.

  • Detach the large air intake pipe that connects the air box to the rear turbo. You will also need to remove the two smaller air pipes that run from the air box to the blow off valves. This gives you access to the oxygen sensor.

  • Use the 7/8-inch wrench to remove the old oxygen sensor.

  • Find the stock sensor wire near the engine lift loop. This will be near your Ford's firewall.

  • Splice the stock wire and connect it to the new oxygen sensor's wire using crimp connectors.

  • Apply some of the anti-seize paste to the threads of the new oxygen sensor. Be careful not to get any of the paste on the sensor itself or it will be ruined. The paste helps ensure an easier removal of the sensor the next time.

  • Screw in the new sensor by hand, then use the wrench to fully secure it in place. The sensor should not be able be turned by hand after it is tightened

  • Reattach the air pipes to their correct locations.

Tips & Warnings

  • You can also use a soldering iron to connect the wires instead of crimp connectors.

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