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Old 09-01-2011, 05:31 PM   #1
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Default 02 denali loss of engine power

codes p0101 maf sensor performance
p0151 ho2s low voltage bank 2 sensor 1
p0131 ho2s low voltage bank 1 sensor 1

under a load vehicle goes lean and into open loop.

any suggestions? swapped maf sensor and map sensors with known good ones no difference.

thank you
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Old 09-01-2011, 05:39 PM   #2
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Test the wires and plug. Had a car a while back with MAF problems, swapped MAF, no change. Finally took the plug apart and found a loose connection.
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