Check Engine Lights
#126
I've been throwing CELs lately but I thought it was because of my midpipe. I'm going to check my gas cap and if that doesn't help, I'll take it to the dealership.
I'm glad I read this thread... good posts guys.
I'm glad I read this thread... good posts guys.
#127
My CEL has been coming on and off for the past two weeks. I finally took it into the dealer and without them even doing a diagnostics check told me it is most likely due to my aftermarket (Borla) cat back exhaust. Is this a ligitimate remark or should I question them further. I told them to run the diagnostics and get back to me.
#128
Registered
I doubt a different cat-back exhaust would directly cause a CEL. Make sure you get the DTC error number from them when they report the results of their diagnosis. Then check the DTC list on the forum (link below) for an explanation of the error . I suspect they are preparing you for denying a warranty repair. If their diagnosis shows an error that is obviously unrelated to the cat-back, calmly indicate to them that you do not accept that it was caused by the aftermarket exhaust system and if they don't come around, call Mazda North American Operations (800-222-5500) immediately to explain the problem and to seek their assistance with getting the problem resolved. That's straight from the owners manual, BTW.
DTC List: https://www.rx8club.com/showthread.p...ight=DTC+codes
DTC List: https://www.rx8club.com/showthread.p...ight=DTC+codes
Last edited by Go48; 12-19-2005 at 05:01 PM.
#129
Originally Posted by Go48
I doubt a different cat-back exhaust would directly cause a CEL. Make sure you get the DTC error number from them when they report the results of their diagnosis. Then check the DTC list on the forum (link below) for an explanation of the error . I suspect they are preparing you for denying a warranty repair. If their diagnosis shows an error that is obviously unrelated to the cat-back, calmly indicate to them that you do not accept that it was caused by the aftermarket exhaust system and if they don't come around, call Mazda North American Operations (800-222-5500) immediately to explain the problem and to seek their assistance with getting the problem resolved. That's straight from the owners manual, BTW.
DTC List: https://www.rx8club.com/showthread.p...ight=DTC+codes
DTC List: https://www.rx8club.com/showthread.p...ight=DTC+codes
#131
Registered
Originally Posted by Carrera
Well, the dealer came back to me today and told me the DTC code registering on the diagnostics is "P0420 Catalyst system efficiency below threshold ON 2 Catalyst ", told me my cat needed replacing, and that it was due to my cat back exhaust system. I'm wondering if this may be due cold weather but I don't know, I'm having a hard time believing that my cat back exhaust system ruined my cat. Any ideas?
#134
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Originally Posted by Carrera
Well, the dealer came back to me today and told me the DTC code registering on the diagnostics is "P0420 Catalyst system efficiency below threshold ON 2 Catalyst ", told me my cat needed replacing, and that it was due to my cat back exhaust system. I'm wondering if this may be due cold weather but I don't know, I'm having a hard time believing that my cat back exhaust system ruined my cat. Any ideas?
#135
Just thought I would add a little update, the CEL came back on again about two weeks ago. This time I took it to a different dealership, they told me the problem was the same, the CAT and seal were bad, but they said they'd replace it no problem under warrantee. It sucks that dealerships can be so different.
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