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P1273 Diagnostic Trouble Code Discussion for July 2007

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

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Trouble Ticket Help Requests for DTC P1273
Help Request Posted
2005 Nissan Altima S 2.5L MIL Lamp on VIN: 1N4AL11D65
P1273: Air Fuel Sensor (Bank 1 Sensor 1) Lean Shift Monitoring. I have a nissan Altima that a mil light,p1273.at an idle both the front and rear sensor stay at .23.If you snap the throttle it Air fuel sensor goes to .83 and the rear Ho2s stays the same.Off idle they stay the same at .23.If load it up with carb spray the fr...
July 16, 2007