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00DAKOTAQC
Dodge Dakota
JOIN HERE
11/20/2005
00:24:05
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 Subject: O2 sensor??
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Message:
about how long do the O2 sensors last before they go out? my check engine light came on the other day so i disconnected the battery and then hooked it back up and the light has never come back on yet. i think the O2 sensor might be dirty or something like that because everything seems to be running fine. It also just passed smog a month ago. 2000 QC 4.7L 4x4
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Kowalski
GenIII
11/20/2005
07:21:01
| RE: O2 sensor??
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Message:
Sounds like you're just guessing and haven't checked what code was set. Key on off on off on (not start) -that will set any obd ii codes stored to read in your odometer, then ends with "pdone".
Lead, follow, or get out of the way
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tc
Dodge Dakota
JOIN HERE
11/20/2005
10:44:53
| RE: O2 sensor??
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Message:
there are hundreds of reasons your CEL can illuminate. get the code - we'll figure it from there! To answer your question, O2 sensors usually last 60-150K miles. they usually go bad slowlly and get "lazy" although they can cause problems quickly. I dont have my 4.7 anymore, but I am pretty sure you actually have 4 O2 sensors. 2 before the cats and 2 after. usually its the ones before the cat that cause problems - but not always. I usually replace my O2 sensors around 100K just for fun - although I recently put one in a 3.9 w/65k because it was causing some serious drivability issues. check engine light, backfire, missing, hesitation, sometimes the truck would not go over 30mph... it threw 2 codes on the computer.
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