No recent changes or modifications. I think the 02 sensor is going out but I am not sure how to check which one.

I saw a few other people with P2A03 but they were generally after mods.

Is there a way to tell if it's a certain sensor or which one? (The left and right bank seem to have considerably different trims as well).

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meta-info header:Error Codes
file version:1
type:5
time:1412187425344
name:Trouble Codes
codes:P2A03,
codes_p:P2A03,
codes_raw:43012A03;;;;
codes_p_raw:47012A03;;;;
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Error Codes
P2A03
O2 Sensor Circuit Range/Performance
Vehicle speed (Speed) 2 MPH
Intake air temperature (IAT) 84 °F
Long term fuel % trim Bank 2 (LTFT2) 4.68 %
Long term fuel % trim Bank 1 (LTFT1) 0.78 %
Engine coolant temperature (ECT) 170 °F
Fuel system status (FSS) Closedloop:usingO2sensorforfuelmix
MAF air flow rate (MAF) 9.93 g/s
Calculated engine load value (EngineLoad) 29.8 %
Timing advance (TA) 35.0 °
Engine RPM (RPM) 975 rpm
Short term fuel % trim Bank 2 (STFT2) 4.68 %
Short term fuel % trim Bank 1 (STFT1) 1.56 %



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Pending Codes
P2A03
O2 Sensor Circuit Range/Performance




Raw values
Error Codes 43012A03;;;;
Panding Codes 47012A03;;;;

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Swap them from left to right clear your code and see if it pops back up