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P0442 Code

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Old Sep 9, 2024 | 07:21 PM
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Default P0442 Code

Had to reset a P0442 code today, It has been nagging me for about a month.
I only drive it about 1K a year, so wasn't really an issue , but am selling it so wanted it off.
Will find out if it stays off, but I recall filing it up while it was running a while ago...
Must have been that hopefully, Have a 2 hour drive to my other house where I'm selling it, well see...
Funny the AutoZone guy told me what the code was and but had a smile when he told me so knew it was something stupid...
He said he wasn't allowed to clear it so Amazon shopping I went. Took longer to hook it up and RTFM than to clear them .






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Old Sep 9, 2024 | 08:15 PM
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Could be as simple as a gas cap not seated correctly.
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Old Sep 10, 2024 | 05:22 AM
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Having read all the forums, That's what I did before clearing ...
Will find out
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Old Sep 10, 2024 | 09:12 AM
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A P0442 code is a diagnostic trouble code (DTC) that indicates a small leak in a vehicle's evaporative emission control system (EVAP). This code is not considered critical, but it can lead to more serious issues if left unaddressed.


Some possible causes of a P0442 code include:
  • A faulty leak detection pump

  • A loose or improperly installed gas cap
  • A gas cap that doesn't meet the vehicle manufacturer's standards
  • A crack or hole in a fuel vapor hose or tube
  • A faulty vent or purge valve
  • A bad vent seal

Some common symptoms of a P0442 code include:
  • A noticeable gasoline smell coming from the car
  • The check engine light appearing on the dashboard
  • A noticeable drop in the car's fuel efficiency


The easiest potential fix for a P0442 code is to tighten or change the fuel cap. If that doesn't work, you can use an OBD-II code scanner to identify the problem and try to solve it yourself. If that doesn't work, you can contact a professional mechanic for a diagnosis and repair.
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