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Old 06-04-2011, 04:49 PM
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Join Date: Jun 2011
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Default 2005 Suburban P0178 code but iys not a flex fuel vehicle

My 2005 suburban has an engine light due to error codes P0178 and P0179. The trouble is that all the information I can find states this is for a fuel composition sensor on flex fuel vehicles - but my vehicle is not flex fuel? I also learned they were installed only on 2000-2002 vehicles while mine is a 2005. Any help is greatly appreciated.

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Old 06-04-2011, 10:46 PM
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Join Date: Apr 2006
Location: KC, MO area
Posts: 8,840

Welcome to the forum.

My wife's 2004 has the L59 Flex Fuel option. Might check your list. I think it's in the glovebox. Or you can go here.
2010 Sheer Silver Tahoe LTZ (all options but sunroof, power boards), GM (body color flaps, rear console, 3rd row mat, 2-Way Remote, chrome gas door, Esky rack), Eagle Eye LED tails, SLP dual tip exhaust, Silver bow-ties/rear wiper, Catch-All mats, AlphaTherm washer fluid heater, Putco chrome mirror covers, silver calipers, board chrome trim, tint, GMPP Major Guard

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05, 2005, chevy, code, codes, engine, error, flex, flexible, fuel, light, p0178, sensor, suburban, trouble

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