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DTC error P2A00 - any guesses?
My '06 Sentra 1.8 just popped that code today in the morning. P2A00. Went to Autozone, and their code reader said something like bank 1 o2 #1 sensor out of range.
I have a short ram I installed almost a month ago, and generic aftermarket header (OBX style) just installed several days ago. At first I got "slow response" from the #1 02 sensor, so I moved it to a another of the available 3 bungs on the header, and that solved that problem.. Now 3-4 days later of error free operation, I get this new P2A00.
From reading threads around a few forums it seems there is a mix of opinions about this code. Is my o2 sensor fried? Is it the MAF that's fried? I honestly can't smell anything different (though I do have a slight cold so that's not helping) to tell if it's rich or not. My MPG display is still showing reasonable gas mileage, but I know it takes a while for it to change the display drastically so I don't know.
My last resort is the dealership, but then with the sr intake and header I think I'll have a heck of a time trying to get them look for the problem rather than blaming it on some odd sr or header issue...nevermind actually telling me the real reason (which I do expect to be related to my header install).
edit: I just called my dealership and they want me to bring the car so they can use "their" machine to check what the codes are. That means I can waste my whole day waiting + $80 over this. Of course, if this is urgent I will do it, but I would like to know if anyone has figured out what this code means.