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Old 28 Oct 2008, 07:01 pm
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Default 2004 Honda Accord Coupe check engine light? ?

In my 2004 Honda Accord Coupe (V6 3.0, 6-speed), my check engine light came on this morning. I flip through the car manual and it says it could be that my gas lid wasn't tight enough last time I screwed it on and to tighten it to 3-clicks. It said to drive around and if that was the only problem, the light should go off within 3 days.Being cautious, I took it to my regular auto shop and an hour later, they said that that I had 2 bad O2 upstream sensors accord to the codes. They said the repair would be $500. Symptoms are less MPG and that if that is the problem, continued driving could cause damage to the catalytic converter.I was going to take it to another shop to get a second opinion, however, about 2 hours later, the light went off. It's been off ever since and now I'm in a dilemma because I don't know if anything is wrong. Did it turn off because the gas cap was the problem? My MPG has been on point.One source of advice says I should drive it and if it comes back, on, get a second opinion. If it stays off, seek my $50 for the diagnostic back from the shop. Advice please?I took it to Advance Auto Parts and scanned the car. It came back with two codes relating to O2 sensors. So even though the check engine light isn't currently on, I think I'm going to take it to get the sensors replaced
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Old 28 Oct 2008, 07:16 pm
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The car is the best indicator of it anything is wrong in this case. Definitely drive it unless it comes back on. As far as asking for your money back from the shop, that would be kind of wrong in my opinion. You asked them to diagnose the problem. They pulled the code, looked it up, and got you a quote. Just because the car's diagnostics were confused doesn't mean the shop did anything wrong...
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Old 28 Oct 2008, 07:31 pm
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Most shops and dealers pad up bills.Car running fine, don't worry.
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Old 28 Oct 2008, 07:46 pm
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Just go to your local autozone and see if they can scan your car for codes for the cel. Unless it was cleared the PCM should have stored the code that turned the CEL on. Report back with what the code was.
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Old 28 Oct 2008, 08:01 pm
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OK well first off NEVER take a car to advance or autozone to get your car scanned, their scanners are over the counter POS's. Would you really trust somone making $7.00 to properly diagnose a problem with a $30,000 vehicle? These places are in business to sell parts, not diagnose cars. The scanners they use identify "generic" codes. What I mean is say the O2 sensor is reading a bad readout, but the real problem is that the spark plugs are not combusting fuel properly, the O2 sensor is what "read" the code first so it was what the scanner picked up on and that is the "PART" you need. Now 2 months later when the same thing happens it will show up O2 sensor again and you will still not be addressing the real problem. Contrary to popular belief a good code scanner costs $1,000-$4,000. I have a Snap-On M.O.D.I.S. scanner that cost $3,000 with all the VEHICLE SPECIFIC attachments and have solved several problems like yours that these places tried to keep selling people parts they didn't need. Even if you dont get your parts from the dealer do yourself a favor and spend $75 for the correct scan. Who knows if it is a spark plug it only costs $20-$30 for all 6 as opposed to $105 EACH for the O2 sensors and labor to install.
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