reads p0140 code after having sensors replaced

1996 PONTIAC GRAND AM
147,000 MILES
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LEEWIL1974
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I failed the emissions got a p0140 code. I know what the code stands for and had the oxygen sensors changed And had new computer installed. The check engine light isn't on but still reads that fault. hit me back please.

No check engine light but still reads p0140 code after having sensors replaced
Feb 23, 2012 at 7:37 PM
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FIXITMR
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possible wiring issue or CAT issue. or new parts have been known to be defective out of the box or damaged during installation.
Feb 23, 2012 at 8:29 PM