I did replace the gas cap with a new one from auto parts store.
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2006 Chevrolet Impala SS Question: engine light on code P442 and P140
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.
Replypushrod, March 26, 2013, 15:06Master
Greg is right, also the last fuel cap i got was from a GM dealer for less than aftermarket, with retainer strap!