I have a pontaic g6 2006 and the code is p0171 I already replace the o2 sensor and mass air sensor and looked for a vacume leak and found nothing. Whenever the code on my car has a hard time starting
You have an overly lean air/fuel mixture. Check for a vacuum leak or exhaust leak ahead of the upstream O2 sensor. HTH. -Jim
Oh okay I was thinking it was a fuel issue since I just had my fuel pump replaced
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