I took it for a smog test, and it had four monitors not cleared it has no other codes, but they wouldn't pass it. It had a broken fuel gauge sending unit and I read that if the fuel gauge is broken it may not allow monitors to clear so I replaced the sending unit and three of the monitors cleared but the secondary air system did not. I was told that it needed to be driven and go through a bunch of drive cycles to clear it, so it was driven for about 30 miles in town miles and forty highway miles with mixed speeds and still it isn't clear. I keep reading about checking for check valve functioning, replacing the O2 sensors even relacing the thermostat to a hotter one, I can hear the pump working but my question is, is there a way to find the cause that a backyard mechanic can do aside from just randomly replacing parts or should I take it to the dealer or a specialty shop? Or will they just start randomly doing what I would do?
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Wednesday, August 3rd, 2022 AT 7:53 PM