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Discussion Starter #1
Bought an 06 gto last week, has slp headers and full exhuast and p1sc procharger. It has the check engine light on was told cuz of the o2 sensor & when I ran the codes today it gave me the knock sensor code and system lean bank 1. Is it as simple as replacing the sensor or does the lean code mean I need a tune? (I'm new to all this)
 
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