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P2A01 Diagnostic Trouble Code Discussion for April 2015

Heated Oxygen Sensor (Bank 1 Sensor 2) Closed Loop Performance

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Trouble Ticket Help Requests for DTC P2A01
Help Request Posted
2007 GMC Sierra 3500 Classic WT 6.0L no drivability issue VIN: 1GDJK34U67
P2A01: Heated Oxygen Sensor (Bank 1 Sensor 2) Closed Loop Performance. Thanks in advance. I can clear these codes and they will usually reset within 300-500 miles. I have test driven with fuel pressure gauge, pressure never drops below 62 psi. We are located at an elevation of 9200 feet. After checking iatn archives noted possibl...
April 28, 2015