2002 Pontiac Grand Am O2 sensor was replaced and check engi

2002 PONTIAC GRAND AM
118,000 MILES • 4 CYL • 2WD • AUTOMATIC
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PEDESCM
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The check engine light came on and I replaced the O2 sensor before the cat converter.
Disconnected the neg bat cable before installed.
Drove the vehicle ten miles and the light came on agan.
What am I missing,How can I solve this problem?
Feb 22, 2008 at 8:19 PM
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