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Originally Posted by mikefocke
A $7 can of electronic cleaner sure cleared my MAF CEL codes up quickly. Now as to O2 sensors. They may be fouled too and I'll replace them but not 4 at a time. That is something a dealer would do.
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Do you mean the dealership would try to "screw" you out of 4 at a time, or that you are leaving it up to the dealership to replace them for you?
Trust me on this one...myself and others on the board have realized that once one goes, the computer will read the new good one and determine that one of the older ones is now bad...and BANG...CEL. After you replace the next "bad" one the computer will now see two new good ones and determine that one of the older ones is faulty...and BANG...CEL. And so it goes...
Replacing all 4 once one has gone will save you a lot of frustration and money...just not upfront. Many people on the boards realize better engine performance/gas mileage amongst other things when replacing all of the 02 sensors.
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