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.
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.
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.
Use the oxygen sensor wrench to remove the oxygen sensor from the exhaust manifold.
Apply the anti-seize compound to the threads of the new oxygen sensor.
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.
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.