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P2A04 Diagnostic Trouble Code Discussion for January 2013

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

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Trouble Ticket Help Requests for DTC P2A04
Help Request Posted
2007 GMC Yukon SLT 5.3L MIL Lamp on VIN: 1GKFK13047
P2A04: Heated Oxygen Sensor (Bank 2 Sensor 2) Closed Loop Performance. Starts good, good fuel pressure, maf readings are good, when engine is at idle or decel the fuel trims climb up instantly. Has mil on for 12000 km. Has good power and no missfires. Checked all data in global data stream as well, we can not figure why the fuel ...
January 11, 2013