The day is coming when only dealers will be able to diagnose anything-here in the rusty state of Ohio, just the fact that your ECU throws a code automatically fails the emission test-my wife's Vibe(built with a supposedly near bulletproof Toyota drivetrain)has been throwing codes almost since day 1-and the dealer blames it on the gas!!! They are completely clueless as to the problem and can't seem to diagnose it(it acts like leaking valve seals at startup)-I'm thinking it's back to the future time and am thinking of finding her a nice 300TDT!

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1982 300DT 190K (Diesel Purge + synthetic oil=smoothness at last!!!)
2004 Ford E-350 6.0 L PSD 227K
2006 Dodge Ram 3500 SRW HO Cummins 4X4 48RE 42K (brute force tow vehicle)
2005 Scion xB wife's rolling pop can
1993 GMC Sierra C3500 6.2 142K