Question about 2005 GMC Sierra 2500HD 4WD
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Posted on Jan 02, 2017
SOURCE: P0101 p0171 p0174 engine codes
Those are lean codes and a MAF (P0101) code. Make sure the MAF sensor is plugged in, and there are no leaks/ loose hoses between the air filter and the engine. You may have a vac leak at the intake also, but check these first, If all appears OK a repair shop will need to check it out for you.
Posted on Dec 16, 2009
ROUGH IDLING CAN BE CAUSE BY MANY THINGS.I AM LOOKING AT LEAKING VACUUM HOSES OR INTAKE MANIFOLD GASKET LEAK.DIRTY FUEL INJECTORS AND WORN ENGINE VALVES WILL CAUSE ROUGH IDLING.ALSO LOW IDLE SPEED CAUSE ENGINE TO RUN ROUGH.
Posted on Apr 18, 2010
CODE PO102 IS MAF SENSOR CIRCUIT LOW FREQUENCY CONDITIONS / CODE PO420 IS CATALYST SYSTEM LOW EFFICIENCY BANK 1 CONDITIONS. BAD MASS AIR FLOW SENSOR WILL AFFECT CONTAMINATE DAMAGE CATALYTIC CONVERTER DUE TO RICH EXHAUST EMISSIONS.
Posted on Jan 26, 2011
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