P0327 & P0171 code - Pontiac GTO Forum
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post #1 of 1 (permalink) Old 04-02-2019, 08:53 PM Thread Starter
 
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P0327 & P0171 code

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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