Intermittent Check Engine Light

Tiny
ALTHEACONKLIN
  • MEMBER
  • 1998 LINCOLN NAVIGATOR
  • 4WD
  • AUTOMATIC
  • 173,000 MILES
Previous P0442 code, gas cap hx, rain (leak=water inside frame), am=rough idle. Driven.
Friday, October 15th, 2021 AT 8:03 AM

1 Reply

Tiny
SQM
  • MECHANIC
  • 6,383 POSTS
Hello,

The code P0442 can get triggered for any type of small leak in the EVAP system. From a leaky gas cap to a cracked hose to a bad purge valve.

Here is a helpful guide:

https://www.2carpros.com/articles/evap-system-code-repair

I have attached the trouble shooting steps for that code below. This can help you with the diagnostics.

Please let me know of any questions.
Thank you.
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Friday, October 15th, 2021 AT 8:35 AM

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