flyanbrian

Just pulled the above 4 codes out of my 05 maxima. Car is running fine but has check engine light on. I could not find much on these codes on here. Has anyone had these on their Maxima's?

DennisMik

iTrader: (2)

Both of the codes are for the air fuel ratio sensor 1 on bank 1 (Firewall side) of the engine.

http://boredmder.com/FSMs/Nissan/Maxima/2005/EC.pdf

see page 428 for P1031
see page 488 for P1148

flyanbrian

ok so it seems I need to find and replace this sensor?

flyanbrian

another note I was just made aware of by my wife is that the car was almost out of gas, so could that trigger these codes?

DennisMik

iTrader: (2)

What you need is an oxygen sensor that Nissan has decided to call the A/F Ratio sensor.
It is located in the exhaust pipe where it bolts onto the exhaust manifold. I doubt that you can see it when looking under the hood, You have to be under the car to see and/or replace it.

And no, the amount of gas in the tank has nothing to do with the codes happening.

AIR FUEL RATIO SENSOR part # 22693-7Y020

flyanbrian

Ok thanks for that! much appreciated!

flyanbrian

this one seems almost impossible to get to, the heat shield blocks the bottom of it from getting a wrench on it. got any ideas on best way to get it removed...dreading thought of going to dealership with it....

flyanbrian

invested in a sensor socket and with some work got it out. word of advice..those are hella tight in there!