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P1273 Diagnostic Trouble Code Discussion for December 2010

Air Fuel Sensor (Bank 1 Sensor 1) Lean Shift Monitoring

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Trouble Ticket Help Requests for DTC P1273
Help Request Posted
2004 Nissan Altima SE 3.5L MIL Lamp on VIN: 1N4BL11D65
P1273: Air Fuel Sensor (Bank 1 Sensor 1) Lean Shift Monitoring. ... this! Car came in with check engine lite on. I scanned with Snapon Verdict scanner and found code P1273 in history. I put all 4 O2 sensors in grafting mode and went for a 20 mile test drive. Bank1 sensors would go lean after car warmed up good. Bank2 sens...
December 27, 2010