How to Replace an Oxygen Sensor on a CR-V

Written by john kearns
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When an oxygen sensor fails on your Honda CR-V, the gas mileage of your vehicle declines noticeably. The oxygen sensor determines the amount of fuel your vehicle burns; when it fails, your CR-V burns more fuel than necessary. Replacing the oxygen sensors on your Honda CR-V is a job you can do yourself. You should notice an immediate improvement in fuel economy.

Skill level:
Moderately Easy

Things you need

  • Oxygen sensor wrench
  • Anti-seize compound

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  1. 1

    Locate the Honda CR-V's two oxygen sensors, which are on either side of the catalytic converter on the exhaust manifold. The CR-V's two oxygen sensors resemble gold spark plugs that have an electrical wire attached to their ends.

  2. 2

    Remove the wiring harness from the back of the faulty oxygen sensor by hand, making sure not to damage the end of the wiring harness.

  3. 3

    Use the oxygen sensor wrench to remove the oxygen sensor from the exhaust manifold.

  4. 4

    Apply the anti-seize compound to the threads of the new oxygen sensor.

  5. 5

    Install the new oxygen sensor to the exhaust manifold using the oxygen sensor wrench. Use your fingers to attach the CR-V's wiring harness to the end of the oxygen sensor.

Tips and warnings

  • Run the CR-V's engine for about five minutes before beginning, because it is easier to remove a warm oxygen sensor than a cold one.
  • Use caution around hot exhaust parts. It only takes a few minutes for them to get dangerously hot.

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