code P0442

Asked by Feb 26, 2017 at 08:34 PM about the 2015 GMC Acadia Denali AWD

Question type: Maintenance & Repair

what does this mean when engine light is on?

7 Answers

24,515

P0442 Evap Emission Control Small Leak Detected

1 people found this helpful.
24,515

Gas cap not on tight or bad, Purge valve bad or unhooked, lines bad or off. canister bad ect.

24,515

A small leak/hole in a fuel vapor hose/tube. Other small leak in EVAP system. Faulty vent o-ring seal. Defective vent valve Defective purge valve Defective leak detection pump. Remove and reinstall the gas cap, clear the codes, and drive for a day and see if the codes come back. Otherwise, replace the gas cap (we recommend an OEM not aftermarket part), or Inspect the EVAP system for cuts/holes in tubes/hoses. More advanced troubleshooting steps include: Using an advanced scan tool, perform an EVAP leak test Verify operation of the EVAP purge solenoid / valve Perform a smoke test to see where the leak is.

24,515

Fuel vapors are routed by hoses to a charcoal canister for storage. Later, when the engine is running a purge control valve opens allowing intake vacuum to siphon the fuel vapors into the engine.

24,515

The vehicle's PCM (powertrain control module) tests the evaporative emissions (EVAP) system for large and small leaks among other conditions. In the case of this DTC, it indicates a fuel vapor leak in the EVAP control system. It means a very small leak has been detected. In fact, the leak can be from a hole as small as 0.04" in diameter. The (EVAP) emission control system prevents the escape of fuel vapors from a vehicle's fuel system.

87,145

small as .020" in dia.

81,425

You'll need a smoke test done to find out where the leak is. The leak can be so small it can't be seen with the naked eye. HTH. -Jim

Your Answer:

Acadia

Looking for a Used Acadia in your area?

CarGurus has 1,718 nationwide Acadia listings starting at $3,995.

Postal Code:

GMC Acadia Experts

  • #1
    Kelly Mayo
    Reputation
    250
  • #2
    Tom Demyan
    Reputation
    180
  • #3
    Rocco Racco
    Reputation
    170
View All

Related Models For Sale

Used Chevrolet Traverse
24 Great Deals out of 1,212 listings starting at $4,995
Used Ford Explorer
20 Great Deals out of 1,741 listings starting at $3,500
Used GMC Terrain
49 Great Deals out of 3,113 listings starting at $1,240
Used Chevrolet Tahoe
10 Great Deals out of 784 listings starting at $5,900
Used Buick Enclave
13 Great Deals out of 1,483 listings starting at $4,877
Used GMC Yukon
13 Great Deals out of 1,045 listings starting at $5,500
Used Toyota Highlander
17 Great Deals out of 1,244 listings starting at $4,910
Used Honda Pilot
13 Great Deals out of 776 listings starting at $2,740
Used Dodge Durango
28 Great Deals out of 1,105 listings starting at $2,400
Used Chevrolet Equinox
74 Great Deals out of 4,624 listings starting at $4,888
Used Jeep Grand Cherokee
67 Great Deals out of 5,333 listings starting at $2,994
Used Nissan Pathfinder
31 Great Deals out of 1,115 listings starting at $5,999
Used Toyota 4Runner
9 Great Deals out of 508 listings starting at $7,900
Used Kia Sorento
49 Great Deals out of 2,611 listings starting at $798
Used Chevrolet Suburban
9 Great Deals out of 467 listings starting at $8,995

Used Cars For Sale

2018 GMC Acadia Denali AWD For Sale
3 Great Deals out of 213 listings starting at $47,899
2017 GMC Acadia Denali AWD For Sale
33 listings starting at $39,998
2016 GMC Acadia Denali AWD For Sale
15 listings starting at $35,998
2015 GMC Acadia Denali AWD For Sale
19 listings starting at $30,888
2014 GMC Acadia Denali AWD For Sale
16 listings starting at $24,999

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.