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2005 Nissan Altima 3.5Lr 6 Cyl, code P1273 is set and when cleared it returns after 2 trips

Vehicle: 2005 Nissan Altima 3.5L 6 Cyl

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Hi there,

This code is for the bank 1 sensor. The first O2 sensor in the system is the A/F sensor. This is on bank 1 which is the bank closest to the firewall. To access the sensor you need to remove the cowl. This is the sensor mounted in the exhaust manifold.
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P1273 NISSAN - Air Fuel Ratio Sensor 1 Bank 1 Lean Shift Monitoring

Read more: https://www.autocodes.com/p1273_nissan.html

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