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    p2a01

    i have 2007 gmc slt 5.3.trucks runs great just got this code p2a01
    asked Feb 12, 2011 by anonymous  

    2 Answers

    P2a01 is a dtc code. 

    P2a01- A circuit/performance range problem with an oxygen sensor, bank 2 sensor one

    answered Feb 13, 2011 by anonymous  
    You probably need the front O2 Sensor Bank 1 (Air/Fuel Ratio Sensor Bank 1). Before replacing the sensor, make sure there are no intake or exhaust leaks.
    answered Feb 13, 2011 by OBDIITech (1,886 points)  

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