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What is code P4055

Tiny
CMONK
  • MEMBER
  • 2006 PONTIAC GRAND PRIX
  • 87,000 MILES
The check gas cap light keeps coming on and I changed the gas cap and large evap leak keeps coming up had smoke test done and no leak what else could it be
Tuesday, October 11th, 2011 AT 1:36 AM

7 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,269 POSTS
Check the filler tube for rust holes. If none are found, have the EVAP system fogged to locate leaks.
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Tuesday, October 11th, 2011 AT 1:50 AM
Tiny
CMONK
  • MEMBER
  • 5 POSTS
I already had a smoke test done no leak and check gas cap light keeps coming on
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Tuesday, October 11th, 2011 AT 2:09 AM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
If I may add. The vent solenoid is a common failure. If the shop that smoke tested it did not seal off the system with a scan tool and manipulate the valve, this could be the issue.

Roy
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Tuesday, October 11th, 2011 AT 11:27 AM
Tiny
CMONK
  • MEMBER
  • 5 POSTS
I am going to have the vent solenoid changed and let u know if it fixed the problem thanks aswmaster6371
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Wednesday, October 12th, 2011 AT 1:12 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,269 POSTS
If there were no leaks found with the fog test, chances are he is right with the vent solenoid.
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Wednesday, October 12th, 2011 AT 1:17 AM
Tiny
SATURNTECH9
  • MECHANIC
  • 30,870 POSTS
Just to add to this one I would also check and see if your canister purge solenoid isnt stuck wide open I have seen that cause a code P0455. See if you can blow thru it with the key off.
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Wednesday, October 12th, 2011 AT 1:39 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,269 POSTS
Cmonk:

If he recommends the canister purge solenoid, that is the first thing I would check. He knows Saturns better than any of us.
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Wednesday, October 12th, 2011 AT 1:50 AM

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