what is this code my son said senserox
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what is this code my son said senserox
Your upstream o2 sensor is reading a lean condition.
OBD-II DTC: P0171 System Too Lean (Bank 1)
You most likely have a vacuum leak
do you know where to get vacuum diagram for 2004 grand prix i checked librarys. thank you
Should be one under the hood.
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