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P0442 is an EVAP code. Your system automatically pressurizes itself at certain times to check for leaks. If the problem is fixed try taking the car up to about 50MPH for a decent amount of time (10-20 minutes) and it should reset itself. SES (service engine soon) codes should also reset if you disconnect the battery terminals for about a minute. If none of those work you can always use an OBD2 scanner tool that has the capability of resetting SES codes to fix your problem. Just a hint, P0442 codes have been known to be associated with cracked or loose gas caps causing the system to be unable to pressurize itself. Check the cap for cracks and re-tighten it then try any or all of the above steps again. If your gas cap feels loose or weak maybe try replacing it. If none of that works you may have not fixed the problem.
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