Funny you mentioned about Autozone's free diagnostic service. I just heard about it on the radio today and had the diagnostic service done there. The find confirmed my suspicions about a faulty O2 sensor. Code #155 came up and indicated that there was indeed a faulty O2 Sensor on the #2 bank. Does anyone know where or which side(driver/passenger) the #2 bank is located? Thanks again for all the responses!
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