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Fuel circuit leak

Tiny
NJBOB
  • MEMBER
  • 2007 CHEVROLET IMPALA
  • 6 CYL
  • FWD
  • 75,525 MILES
Chk eng lite on. After ******* up. Trouble code saya leak in that system. How to check?
Saturday, March 5th, 2011 AT 10:35 PM

4 Replies

Tiny
WRENCHTECH
  • MECHANIC
  • 20,761 POSTS
What was the exact code number?
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Saturday, March 5th, 2011 AT 10:46 PM
Tiny
NJBOB
  • MEMBER
  • 2 POSTS
Shows code po455 large leak evap system
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Saturday, March 5th, 2011 AT 10:48 PM
Tiny
WRENCHTECH
  • MECHANIC
  • 20,761 POSTS
The evap system is the inside of the fuel tank. The most common reason for that code is leaving the gas cap loose or off. I would check the cap and clear the code and see if it comes back. It doesn't effect engine performance at all.
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Saturday, March 5th, 2011 AT 10:55 PM
Tiny
MHPAUTOS
  • MECHANIC
  • 31,937 POSTS
Start with checking the fuel cap and the EVAP system for leaks look for a vacuum leak in the system, start here.

Mark (mhpautos)
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Saturday, March 5th, 2011 AT 10:58 PM

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