engine light on code P442 and P140 on 2006 Chevrolet Impala SS

I did replace the gas cap with a new one from auto parts store.

by in Houston, TX on March 26, 2013
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1 answer 1 comment
ANSWER by , March 26, 2013
bank 1 sensor 2 has issues with reading exh gases. after market gas cap are not always reliable. po442 could be cap issues or evap leaks in other areas.
COMMENT by , March 26, 2013
Greg is right, also the last fuel cap i got was from a GM dealer for less than aftermarket, with retainer strap!