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Toyota MR2 Oxygen Sensor

Diagnosing a Bad Toyota MR2 Oxygen Sensor

The Toyota MR2 is a two-seater sports car that is built to compete with the Ferraris and Porsches of its time, as it was designed both for speed and fuel efficiency. However, if one of its essential components like the oxygen sensor fails, it won't be as interesting and as unique as it was envisioned to be. You may not know it, but your very own Toyota MR2 could be exhibiting some of the symptoms of a defective oxygen sensor. Here are two common problems you might experience with your Toyota MR2 oxygen sensor, along with some tips on how you can diagnose it:

'Check engine' light is on

If recently you find it very disturbing to see this omnipresent red light on your dashboard, then consider this as one of the manifestations of a failing oxygen sensor. When this particular light is on, it means that there is a malfunction in your vehicle, wherein the most common reason is a bad oxygen sensor. What you can do to verify is to check if you've been having increased fuel consumption during the past weeks. Also, notice if there has been changes in your engine performance. If you have been experiencing misfiring or idling, then you can conclude that your vehicle's oxygen sensor is problematic. The 'check engine' light would only turn on if you will repair or replace your defective sensor with a new one.

Emission test failure

A failed oxygen sensor will most likely produce inaccurate amounts of oxygen in the exhaust gases. You can verify this by checking the voltage that it produces using a voltmeter. The ideal reading should be around 0.1 or 0.2 volts within two to three minutes. But if the reading exceeds this range and the time interval, then you should replace your oxygen sensor. If not, you will experience various emission- and engine-related problems that you will only be able to solve if you replace your defective sensor. You are also releasing more harmful emissions that could put your health at risk. Ultimately, you will surely fail in emission tests if you will continue to use a bad oxygen sensor.

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  • Three Useful Tips to Maintain Your Toyota MR2 Oxygen Sensor 27 February 2013

    Whether you love customizing your Toyota MR2, or you simply admire its built-in sleek and notable features, then you should know that proper care and maintenance to its components is key to improve its performance. Its oxygen sensor, for one, is an essential part that when kept in good condition, the engine will surely operate smoothly and efficiently. Improving your vehicle's performance doesn't have to be costly; you simply need to know how. Here, we are giving you some tricks on how to take good care of your Toyota MR2's oxygen sensor:


    Replace oxygen sensor regularly.

    Did you know that by keeping this sensor in good condition, your fuel economy can improve as much as 10 to 15 percent? This translates to a whopping $100 fuel savings per year! In addition, an oxygen sensor minimizes the risks of damaging the catalytic converter and other exhaust system components. We recommend that you replace your oxygen sensor every 60,000 to 100,000 miles to ensure that your sensor is fresh enough to improve your engine's performance.


    Keep it clean.

    Sometimes, all your oxygen sensor needs is cleaning and not necessarily replacing it. Do this if the vehicle's computer says that it is running a little rich or lean, which means that the sensor is not really bad. To clean it, you can use a throttle body aerosol cleaner. Make sure that there is an indication that it is safe to be used on oxygen sensors. Afterwards, heat it up with a torch and soak it in warm water. Remove the residues using an air hose and then soak it in gasoline for 24 hours. Voila! Your oxygen sensor is as good as new.


    Check for damage or corrosion.

    The oxygen sensor is situated in a dirty environment, so don't be surprised if it gets moist or corroded over time. However, if you noticed that the corrosion is eating it all up, then it's time to replace it with a new one. If there is any loose gasket or a missing bolt, replace it immediately as well. A worn-out oxygen sensor will no longer do any good to your vehicle, except, cause more damage.