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#1 Re: trouble code po171 bank 1
Explicit_Spade

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08-11-2012

Your upstream o2 sensor is reading a lean condition.

OBD-II DTC: P0171 System Too Lean (Bank 1)

Originally Posted by W-Body Store

Remember, GM engineers didn't take into account your need for speed.

Daily Driver: 06 Grand Prix GT / 9.4:1 CR / IS3 Heads / Ported Gen V / ZZP Headers / HPT Pro / Pulleys: 4.25, 3.8, 3.5, 3.4, 3.2, 3.0, 2.9, 2.7
Projects: 86 Monte Carlo SS / 98 Sonoma / 74 Honda CB750

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