Question about 2004 Nissan Sentra

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2004 nissan sentra problem

I have the check engine light go on. I took it to auto zone to have it checked when they used the machine to see the problem the code the came up was:
P1273 AF sensor lean shift detected. I just dont know what that means. Can u help?

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  • Anonymous Mar 31, 2014

    code on dont know what it could be

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HI
the (P1273) refer to A\F SENSOR
that locate in the exhaust pipe
it was a sensor calculate the air to fuel ratio in the exhaust pipe and send that as electrical signal to the (ECU) that use it to correct the fuel injection timing in result to have economy of fuel and low bad gases in exhaust
the cause of this fault is :-
air fuel ratio sensor 1
air fuel ratio sensor 1 heater
fuel presser
fuel injectors
intake air leaks

ask for more
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Posted on Jul 14, 2008

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