2001 GMC Yukon diagnostic codes

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

What should I fix?

Thanks, Sherry
Feb 12, 2008 at 2:15 PM
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DENNYP
  • ✓ASE Certified Mechanic
  • 1,824 POSTS
  • ASE Certified Mechanic
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.
Feb 26, 2008 at 8:52 PM
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