How can I check the O2 sensor on my car?

But after you replace the oxygen sensor take a moment and verify that the repair is complete. You can monitor the data stream or perform an O2 sensor test with the very affordable Actron CP 9580 scan tool. For a full review of this scanner visit my auto scanner reviews page.

What causes bad engine lights and O2 sensor codes?

There are other possibilities besides bad sensors that will set these kinds of trouble codes. Major and minor problems with the engine or vehicle could be at the root cause of the malfunction.

What does O2 sensor code 08-s-05 mean?

The Ford recall number is 08-S-05. Another thing I would like people to understand is the O2 sensor code does not mean it’s time to replace the sensor. It means that it’s time for some diagnosis and repair. If the diagnosis leads to a replacement of an oxygen sensor that is just fine.

What does it mean when check engine light comes on?

Q: Check Engine light comes on, mechanic replaced o2 sensor but light still comes on. Check engine light comes on, mechanic ran diagnostic and said it needs o2 sensor replaced. He replaced it but light still comes on.

Can a check engine light be an oxygen sensor?

It seems as though the check engine light and O2 Sensor codes have always gone hand in hand. I can’t even begin to tell you how many perfectly good sensors I’ve seen replaced for a rich/lean code, or as a cure to a service engine light that comes and goes. Fact is, when oxygen sensors were first being used, they did tend to fail.

There are other possibilities besides bad sensors that will set these kinds of trouble codes. Major and minor problems with the engine or vehicle could be at the root cause of the malfunction.

What happens when the O2 sensor is replaced?

If the mechanic completed the O2 sensor replacement, reset the codes and the error code was triggered again, it is possible that the catalytic converter is damaged and needs to be replaced.

What does the P0420 code on a check engine light mean?

When check engine lights are scanned, a p0420 code is a very common result. It’s actually a generic code, meaning it can be thrown from any vehicle after 1996. Commonly, people think the p0420 code indicates that the oxygen sensors need to be replaced, but that’s definitely not always the case.