P2A00 is not a bad sensor. Generally this code is caused by an air leak somewhere between the MAF and the primary O2 sensor. If the O2 sensor was actually bad you'd have about 2-3 other codes along with it.
If you still end up replacing the sensor make sure you get the correct one as somewhere around 2010-2011 Nissan changed the connector on the sensor.
fwiw the primary O2 sensor on our Z's have 4 wires. They are also very sensitive to hard vibration (impact guns). O2 sensors of the past may have been cheap and simple but the ones on our cars are definitely not.
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