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
1 answer 1 comment
ANSWER by on 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 on 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!

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