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Car Forum / Mazda / Mazda Miata / November 2004Check Engine Light
Suddenly, my check engine light sporadically comes on.....but the car drives great. Any ideas? Oh, yes, my gas cap is on tight :) ~Cissy :-) I posted this question on 10/31. Got no response which is highly unusual....however, I have solved it, so I thought I'd post what I found to be the reason the Check Engine light came on. I had a defective O2 sensor. Replaced it.....engine light off :) ~Cissy :-) >I posted this question on 10/31. Got no response which is highly >unusual.... Well, you cannot expect an answer to *every* question you post. We are not Santa Claus. Leon >however, I have solved it, so I thought I'd post what I found to be >the reason the Check Engine light came on. > >I had a defective O2 sensor. Replaced it.....engine light off :) >~Cissy :-)  SignatureLeon van Dommelen :) Bozo, the White 96 Sebring Miata .) rammm@dommelen.net http://www.dommelen.net/miata EXIT THE INTERSTATES (Jamie Jensen) >Well, you cannot expect an answer to *every* question you post. >We are not Santa Claus. > >Leon What??? Nooooooooooo! Don't tell me that! I believed in Santa Claus <pout> What now? ;) ~Cissy :-) Last time I checked, my engine was kind of heavy :-O Ken > >Well, you cannot expect an answer to *every* question you post. > >We are not Santa Claus. [quoted text clipped - 4 lines] > now? ;) > ~Cissy :-) >Last time I checked, my engine was kind of heavy :-O > >Ken YIKES!!! ;-D LMAO! ~Cissy :-) As soon as I left the E-check station my check engine light came on again. I took it to the Mazda dealer and found out that the catalytic convertor had gone bad. They replaced it for free. It would have cost me $588.00 if it was not under warranty. Check engine light problem solved. > >I posted this question on 10/31. Got no response which is highly > >unusual.... [quoted text clipped - 9 lines] > >I had a defective O2 sensor. Replaced it.....engine light off :) > >~Cissy :-) Where is and what is the 02 sensor? Tell us more about replacing it so we can do the job. Thank You >Where is and what is the 02 sensor? 1) In the engine. That is why it generates a check engine message. 2) A sensor that measures oil pressure and oil temperature (hence O2). >Tell us more about replacing it so we can do the job. It is fairly easy, though a bit strange. First you need to get it out of the engine. To be able to correctly measure the oil conditions, it must be floating in the oil somewhere below the dipstick hole. After you get it out, you can just disconnect it from the attached cable and plug in the new one. If you do not have the Mazda SST (special service tool) to get it out, dropping the tube of a little pump down the dipstick hole also works great. Just wiggle the tube a bit around and pump until it catches the little bugger. Pull up through the hole. They are about $25 a piece if you buy them generic instead of from the dealer. >Thank You You are welcome. :) Leon SignatureLeon van Dommelen :) Bozo, the White 96 Sebring Miata .) rammm@dommelen.net http://www.dommelen.net/miata EXIT THE INTERSTATES (Jamie Jensen) I'm speechless! Where was the stash? >>Where is and what is the 02 sensor? > [quoted text clipped - 23 lines] > > Leon >They are about $25 a piece if you buy them generic instead of >from the dealer Over 15 years, we have replaced the O2 sensor 3 times. Each replacement has been the generic. Mazda wants over $200 for them (ACK!). Although the generic seems to last only a few years, it's worth it. The symptoms of bad O2 sensor always before was poor performance, slight stumbling, etc. This time, the car ran like a top........but with Check Engine light on. Took us awhile to get around to testing the sensor as it didn't occur to us this could be the problem.... Geeze, ya never know. To know how to test, check a Miata shop manual. Gives details on how to do it. You will need a volt meter. ~Cissy :-) |
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