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How to Replace the Oxygen Sensor on a Ford 5.4

by Russell Wood

The Ford 5.4l V-8 engine is a powerful and popular engine that's been used in multiple generations of Ford F-150 trucks. In a 2005 model, as is the case with this project vehicle, it uses a pair of oxygen sensors to send data to the truck's computer, to ensure that emissions and performance are all in proper order. When these go out, the engine light will come on in the dashboard, and you will have to replace them.

Step 1

Allow the engine to cool for an hour prior to working on the exhaust. Lift the truck into the air using the jack and put it down onto the jack stands.

Step 2

Locate the oxygen sensors on the exhaust. They are on the exhaust, just where the exhaust connects to the exhaust manifolds, by the firewall of the truck. Unplug the wiring harnesses on the sensors and remove the sensors using the oxygen sensor wrench.

Step 3

Use the applicator provided with the anti-seize compound to apply anti-seize compound to the threads of the replacement oxygen sensors. Be very careful not to get any of the compound on the sensor body itself.

Install the sensors into the exhaust using the oxygen sensor wrench, then connect the electrical harnesses using your hands.

Items you will need

  • Jack
  • Jack stands
  • Oxygen sensor wrench
  • Anti-seize compound
  • Replacement oxygen sensors

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