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P1273 Diagnostic Trouble Code Discussion for May 2009

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 2.5L MIL Lamp on VIN: 1N4AL11D1R
P1273: Air Fuel Sensor (Bank 1 Sensor 1) Lean Shift Monitoring. has anyone experience this code p1273? did all that alldata recommends except reprogramming the ecm. snap on scanner doesnt support clearing the self-learn on the ecm. the parameter on the scanner for ho2s2 always reads lean even with o2's disconnected
May 01, 2009