2001 GMC Yukon diagnostic codes

Tiny
SHERRY JOHNSON
  • MEMBER
  • 2001 GMC YUKON
  • V8
  • AWD
  • AUTOMATIC
  • 145,000 MILES
What does it mean when the repair code is P0440?

What should I fix?

Thanks, Sherry
Tuesday, February 12th, 2008 AT 2:15 PM

1 Reply

Tiny
DENNYP
  • MECHANIC
  • 1,823 POSTS
P0440 is an EVAP system fault. You first need to make sure your fuel cap is tight. If that ckecks ok, then you will need to take it to a shop that is equipped to test EVAP systems.
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Tuesday, February 26th, 2008 AT 8:52 PM

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