2007 nissan versa trouble code P2A00,what is this?

you need service and repair manual in which you will find everything you want and you can get the manual from the given link http://toolsnyou.com/

Have you check at the dealer ? Recall on defective air bag .
2007 2012 Nissan Versa Recall Alert News from Cars com

oopppssss.. obviously this can be water intrusion related..
BE CAREFUL... AIR BAGS CAN BE TRIGGERED WHILE TROUBLE SHOOTING.. this IS a job for a QUALIFIED PROFESSIONAL!!

2007 2013 Nissan Versa or Rogue Rear Trunk Lock Actuator Latch Motor...

Any codes?

The average price to replace a headlight on a 1994 Nissan, especially if you did it yourself, would be about $10.
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sounds like your starter cylinoid is sticking needs to be taken off and tested and maybe rebuilt or replaced

this obd2 trouble code table can help you understand the menaing of code, and for p0031, try:

check for 12 volts at the heater circuit feed (hint: unplug the sensor and check at the wiring connector to do this measurement).

check the ground circuit for continuity.

measure the resistance of the heater circuit (done on the sensor itself).

measure the resistance and voltage of the wiring.

NISSAN ORIGINAL EQUIPMENT RADIOS DO NOT HAVE A SECURITY CODE

Rickbarfuss,

The PA200 code is for a front A/F sensor, not an O2 sensor. This is a fairly accurate code and I am 99.99% sure that if you simply clear the code, it will come back. Is the car out of warranty?

The tire light will not go out on its own if the tire went really low. There are two codes the low tire pressure warning system can set and they are low tire and flat tire. The low tire code will go away once the pressure is corrected, the flat tire code has to be cleared with the computer at the dealership.