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po171

locate oxygen sensor on 1998 Pontiac grandprix

Vehicle: 1998 pontiac grandprix 3.8
asked Nov 24, 2013 by john

1 Answer

P0171 Fuel trim to lean bank 1

When you get a lean bank code check for vacuum leaks, The 02 sensor should be checking are the engine management sensor which are upstream sensor

answered Nov 24, 2013 by Reynaldo (9,606 points)
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