2002 Yukon P0101 And Lean Banks Error Codes

By [email protected]
January 2, 2010 in 2000-2014 Silverado HD & Sierra HD

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[email protected]

Posted January 2, 2010

have a 2002 yukon with a 5.3. live in alaska and see some problems when it gets really cold ... like now @ -25F! Just pulled a P0101 MAF out of range and both banks lean eng codes. Yukon running rough at idle with mis like symptoms. running down road, engine rpms too high ... rpms at 1500+ when i put it into neutral. I have changed both O2 sensors, cleaned MAF sensor, change air idle control valve, new plugs, new wires. Yukon has 110K miles. Any suggestions? I have heard that there maybe issues with the factory intake manifold gasket material not enduring the extreme cold temps in alaska. Any service bulletins on this? I'd like to explore every option before changing out the manifold gasket.

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