My engine is running either too ?
i have changed the spark plugs and changed the ignition coils to see if that will work( at first it was saying that i had a miss fire) now they are saying it might be the oxeygen sensor or the mass air flow sensor. it is a 2001 chevrolet prizm. how can i find out which sensor it is so that i don't waste money it is almost 400 to get all 3 sensors ( there are two oxygen sensors to change)
4 hours ago - 3 days left to answer.
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41 seconds ago
i already had the test run its saying that it is running lean or richEngine on a 2001 chevy prizm?
Lean/rich does NOT mean the O2 sensors are bad!
Go ahead and spend $400 on good parts.
That's more than the shop visit you could make!
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It seems as though the check engine light and O2 Sensor codes have always gone hand in hand. I can檛 even begin to tell you how many perfectly good sensors I檝e 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. But manufacturers have been redesigning and tweaking these parts for over twenty years, and nowadays they are fairly bullet proof! Oxygen sensor codes no longer mean %26quot;replace the oxygen sensor%26quot;, and this mindset can be costly! So what goes wrong during the diagnosis of these systems? Well, let me share my experience and you can take it for what it檚 worth!
There are a large number of codes relating to oxygen sensor faults. There are also a lot of faults that are often incorrectly thought to be caused by a bad oxygen sensor (also referred to as an O2 Sensor).
Engine on a 2001 chevy prizm?
Then that is the O2 sensors. Which one? They should be able to tell you that.
