Question about 2003 Pontiac Grand Am

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03 grand am wil turn over but not start after changing o2 senser

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I suppose you could have disconnected a wiring harness some how.
The sensor only tells the computer if the fuel mixture is rich or lean, so the car would run with the sensor disconnected.
Does the check engine light come on when you turn the key switch on ? ?
Are you getting spark to the plugs ?

Posted on Jan 09, 2013

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Posted on Jan 02, 2017

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