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EVAP Purge Flow fault

Tiny
DMOORE1
  • MEMBER
  • 2005 CHEVROLET CAVALIER
  • 4 CYL
  • FWD
  • AUTOMATIC
  • 42,000 MILES
My check engine light came on and I had diagnostic check at the local Advance Auto. The diagnosis code was P0496-Evap Emission High Purge Flow fault. I have trouble starting the vehicle after I fill up the tank of gas. Please help.
Monday, April 6th, 2009 AT 9:00 AM

13 Replies

Tiny
MMPRINCE4000
  • MECHANIC
  • 8,548 POSTS
Best to take to dealer or trusted mechanic and get system fixed. There are solenoids that open/close to move tank fumes back to intake, one or more of the solenoids is not working causing code.
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Wednesday, April 8th, 2009 AT 9:15 AM
Tiny
LORAMARIE1025
  • MEMBER
  • 1 POST
  • 2005 CHEVROLET CAVALIER
  • 4 CYL
  • FWD
  • AUTOMATIC
  • 40,000 MILES
Hello, I got the dignostic test on my car and it says Evaporative Emission System Large Leak detected code P0455A. Someone told me it could be the gas cap. Im so broke its not even funny. So I really hope its the gas cap. What do you think?
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Friday, June 19th, 2020 AT 12:21 PM (Merged)
Tiny
RENAUDTN
  • MECHANIC
  • 636 POSTS
You probably have one of the following:

- loose/defective gas cap: (retighten it, clear the code and drive the car around; hopefully that's all it needs).
- leak in EVAP system: you may have a loose hose, something wrong with the canister or the vent valve is stuck open (this valve is behind the gas tank; try to tap on it gently; it may release it).
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Friday, June 19th, 2020 AT 12:21 PM (Merged)
Tiny
JENNAPALMER
  • MEMBER
  • 1 POST
OMG I think we are kindred spirits! I have the same car checy cavalier, same year 2005 and same exact code! AND I am as broke as the 10 commandments! Hope and pray it is the gas cap! Dis you ever find out?
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Friday, June 19th, 2020 AT 12:21 PM (Merged)
Tiny
CATHY2010
  • MEMBER
  • 2 POSTS
  • 2003 CHEVROLET CAVALIER
Engine Performance problem
2003 Chevy Cavalier 6 cyl Front Wheel Drive 65000 miles

trying to locate where the evap selinoid and evap canister is located
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Friday, June 19th, 2020 AT 12:21 PM (Merged)
Tiny
BASSTECH
  • MEMBER
  • 236 POSTS
Is this car a 6 cyl? Not sure they offered one that year.
Please check year and engine size, then I'll be glad to help.
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Friday, June 19th, 2020 AT 12:21 PM (Merged)
Tiny
CATHY2010
  • MEMBER
  • 2 POSTS
My car is a 4 cyl.
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Friday, June 19th, 2020 AT 12:21 PM (Merged)
Tiny
BASSTECH
  • MEMBER
  • 236 POSTS
Thanks for that info.
The purge soleniod is located next to the power steering pump on the right side of the engine on the top.

The evap vent soleniod in located in the evap canister which is located in back of the fuel tank in the rear of the vehicle just above the rear axle.

Hope this helps, any more questions, just ask.
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Friday, June 19th, 2020 AT 12:21 PM (Merged)
Tiny
SVS_WTF
  • MEMBER
  • 11 POSTS
  • 2002 CHEVROLET CAVALIER
  • 4 CYL
  • FWD
  • AUTOMATIC
  • 100,000 MILES
Evaporative Emission Control System Malfunction
What does this code mean exactly this was the code it read p0440?
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Friday, June 19th, 2020 AT 12:21 PM (Merged)
Tiny
RHALL77
  • MECHANIC
  • 3,361 POSTS
Evaporative emission (EVAP) system has a large leak.
Check the gas cap or vent valve. These are the most common problems
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Friday, June 19th, 2020 AT 12:21 PM (Merged)
Tiny
SVS_WTF
  • MEMBER
  • 11 POSTS
Thx, It turned out 2 be the gas cap. I got 1 for 6 $ @ murrays cheacked the code and it still had a problem so I returned it and got a dealer one and that did the trick.31.00$ for this 1 but quality worked.
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Friday, June 19th, 2020 AT 12:21 PM (Merged)
Tiny
2CP-ARCHIVES
  • MEMBER
  • 4,540 POSTS
  • 2002 CHEVROLET CAVALIER
  • 10,000 MILES
Where is the purge/vent solenoid on and what is the easiest way to change it?
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Friday, June 19th, 2020 AT 12:21 PM (Merged)
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
According to the manual it is on the side of the engine, above the oil filter under the exhaust manifold, , be sure to check the hose going to it for damage as well. Check out the diagrams (Below). Please let us know if you need anything else to get the problem fixed.
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Friday, June 19th, 2020 AT 12:21 PM (Merged)

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