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Discussion Starter · #1 ·
We have a 2021 Seltos with 3500 miles on it. We recently got a check engine light and through the UVO app the error code is P044200. From an internet search:
P0442 is present in vehicles that have a small leak in the EVAP system. The ECU carefully monitors the EVAP system for any leaks or irregularities, when a small leak is detected the ECU set a Check Engine Light to be displayed on the dashboard.
What causes the P0442 code?
  • Faulty or loose fuel cap
  • EVAP system line leak
  • Charcoal canister leak
  • Fuel tank leak
  • Failed vent or purge valve
The car has been at the dealer for 2 weeks and they say they are working with Kia technical support to try and diagnose this. They say they tested both the gas cap and purge valve and both are good. Seems like a fairly simple problem that is taking an awfully long time to fix. Has anyone else had this problem and what was the fix.
 

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I had a 2013 Hyundai Veloster Turbo that developed this problem. My dealership literally told me they couldn't fix it and that I would have to live with the check engine light being on all the time. This while it was under warranty. Technically I think the CEL is because of a "three strikes" condition. If a minor code is detected three times in a row it turns the CEL light on after the 3rd one.
 

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Discussion Starter · #3 ·
They finally replaced the purge control valve and gas cap and the problem is fixed. It was at the dealer for 2 weeks for them to finally determine the cause and fix it. I'm not sure if we weren't a priority since we didn't purchase the car at this dealer but this dealer is 15 miles closer to my home.
 
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