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Old 12-18-2005, 10:30 AM   #1 (permalink)
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Well, I got a CEL yesterday. But the car is running fine! No hesitation, no rough idle, nothing noticeable at all. Checked the fuel cap and door and everything looked fine as well.

I tried to get the codes read at AutoZone, but the reader kept throwing a "Connection Error." He said he'd gotten the same error twice earlier in the day when connected to another vehicle, but was able to connect on the third try. No luck with my 6 on three tries so I just took it home. HE thought the scanner could be having problems, but could he have been using the wrong scan tool? He checked the tool for the model year, but I have no idea what a "CAN bus-capable scan tool" is and didn't think to ask him when he was trying to read.

Anyway, I'm still in warranty and bringing it to the dealer tomorrow, but I was wondering if I should drive it (about 13 miles) or trailer it to them. Also, if I do drive it, what's the max speed I should go?

Any recommendations are appreciated (especially from crossbow! )
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Old 12-18-2005, 11:24 AM   #2 (permalink)
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So long as the CEL isn't flashing, you should be safe to drive it to the dealer. The manual recommends getting the car towed only if the CEL is flashing.
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Old 12-18-2005, 11:59 AM   #3 (permalink)
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So long as the CEL isn't flashing, you should be safe to drive it to the dealer. The manual recommends getting the car towed only if the CEL is flashing.
[/b]
No flash - solid as a rock.

Thanks! I'll be heading there first thing in the morning.

And next time I'll RTFM.


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Old 12-18-2005, 02:54 PM   #4 (permalink)
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They were probably using their real basic OBDII scanner at autozone. Our cars do require the CAN compatible scanner which is a newer protocol that only some of the more expensive OBD II scanners support. I have the Autoxray 5000 which is CAN compatible and works nicely on the 6. It gives quite a bit of data for a DIY scanner.
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Old 12-18-2005, 04:45 PM   #5 (permalink)
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Well, I got a CEL yesterday. But the car is running fine! No hesitation, no rough idle, nothing noticeable at all. Checked the fuel cap and door and everything looked fine as well.
[/b]
I wouldn't be surprised if it WAS the gas cap. Had a CEL a few months ago, same symptoms as you, and checked and re-checked the gas cap. Dealer got a "loose gas cap" code, and reset the light, figuring the problem was solved. Light comes back on four days later, and the dealer then decides to run a pressure check on the gas tank, and discovered that the gas cap itself was faulty. They replaced it, apologizing three times for not finding the problem the first time.

Good luck, and let us know what the dealer finds out...
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Old 12-18-2005, 05:07 PM   #6 (permalink)
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If you have no trouble code reader, as a sanity check you can disconnect the battery cable, negative cable (is highly recommended) and see if this will reset the error codes. If the code reappears and chances are it will then find some one who can get the error code.

I use the AutoEnginuity software package.
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Old 12-18-2005, 06:07 PM   #7 (permalink)
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If you disconnect the battery the code and the FFD will be lost.

Maybe Crossbow will be of some assistance.
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Old 12-18-2005, 06:38 PM   #8 (permalink)
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If you disconnect the battery the code and the FFD will be lost.

Maybe Crossbow will be of some assistance.
[/b]
Not going to reset anything. I'll leave it all up to the dealer. They've been really good so far, and I don't expect it to change.

Yesterday when I checked the gas cap all I did was make sure it was tight. Today I took it off and when I did there was a little "puff" like the tank had more pressure in it than I remember. Not a lot, just a little bit - less than opening a coke. But it was noticeable.

Anyway, when I find out for sure what code it threw and the solution I will post it all here.

Thanks for all the suggestions!

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Old 12-19-2005, 10:47 AM   #9 (permalink)
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Error code was P0442 - Small Evap Leak.

They performed an evap test several times and it passed each time.

They also installed a new PCM and TCM update for my vehicle and did their free multipoint inspection (brake pads, tire tread, fluids, etc.)

Total time was a little less than 100 minutes from the time I pulled into the service bay until I was back on the road - and for 10 of that they weren't officially open.

The only thing I can figure is the gas cap came loose or I didn't tighten it properly or something.

Happy camper.
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Old 12-19-2005, 07:37 PM   #10 (permalink)
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http://forum.mazda6tech.com/viewtopic.php?t=2312
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