rear oxygen sensor

Rear Oxygen Sensor Replacement

Ever wondered how modern cars try to stay compliant? Well, that’ll be the sensors all over your car. And, when they go wrong, you may end up driving a black cloud on four wheels instead.

So, make sure that your rear oxygen sensor is functioning before it’s too late. Knowing the signs of a rear oxygen sensor going bad will save you money. Otherwise, you’ll have an expensive repair bill!

If you’re wondering if you should replace all O2 sensors at once or if a new O2 sensor improves performance, then check out the following signals that it’s time to replace your rear oxygen sensors.

Check Engine Light

You can tell that your rear O2 sensor has gone bad if it displays a check engine light as well as an indication that you are running rich or lean. The reason is that the sensors connected to these signals will detect varying levels of unburned fuel, and in turn, this will set off your light. And a rich signal would mean a lean mixture and vice versa.

And, depending on the car, you may find other lights are affected too. Modern diagnostics set out to measure multiple parameters, including fuel efficiency, engine performance, exhaust emissions, and general running conditions. You may even find oxygen sensor codes keep coming back even after you’ve fixed them.

An O2 sensor replacement cost can be anywhere between $100 and $500 from a mechanic, so don’t ignore them once they keep returning. You should replace all O2 sensors at once because most of the cost is in labor rather than parts.

Reduced Economy

If you find that all of a sudden, you’re getting nowhere near the amount of mileage you normally do from your tank, chances are you’ll need a new rear oxygen sensor.

A bad rear O2 sensor will show signs of trouble in several ways. The front O2 sensors have a direct effect on fuel economy and power delivery.

With a malfunctioning one, this could all be thrown out the window. This is especially the case in older cars where the internal computers aren’t as clever as the new ones. Depending on the age of your car, it might be worth considering a replacement car to save you money on future repairs.

Failed Emissions Test or Visible Smoke

If there’s no visible smoke, then taking an emissions test is the most sure-fire way to know that your rear oxygen sensor is on its way out. It will give you some physical evidence that the sensor needs replacing as soon as possible and may bring up other hidden issues at the same time.

That said, if there’s more smoke than normal coming from the exhaust, then chances are it’ll fail the emissions test. It’s most noticeable in the Summer when temperatures are high and driving through less polluted areas. If this happens, then take your vehicle into a garage and have them replace the rear O2 sensor so you can drive safely again.

Replace Your Rear Oxygen Sensor Today

This is why the rear oxygen sensor is so important. It can affect your car’s ability to maintain the correct level of fuel efficiency, power delivery, and exhaust emissions. When you start seeing any signs that your rear O2 sensor has gone bad, it’s time to get it replaced.

If you’re wondering what to do after replacing an oxygen sensor and it’s still causing issues, consider swapping your car instead. Get in touch with us today and see how we can help you find the perfect replacement!

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