1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

Evap prob P0442

Thread Tools
 
Search this Thread
 
Old 07-23-2009, 06:36 PM
  #1  
Senior Member
Posts like a Corvette
Thread Starter
 
Nighthwk12's Avatar
 
Join Date: Feb 2009
Location: Jersey Shore
Posts: 1,511
Likes: 0
Received 0 Likes on 0 Posts
Nighthwk12 is on a distinguished road
Default Evap prob P0442

So my car is still not getting great gas mileage like between 15-17 high way conditions. For the second time I got a P0442 which is slow leak in the Evap system. I have no vacumme hose leaks where else could it be leaking? what parts can I change or recharge. Write up will ensue.bs2
Old 07-23-2009, 07:44 PM
  #2  
Senior Member
True Car Nut
 
Purplehazeir's Avatar
 
Join Date: Sep 2008
Location: Arlington, WA
Posts: 7,979
Likes: 0
Received 1 Like on 1 Post
Purplehazeir is on a distinguished road
Default

According to some article I've read, a leak as small as .04" in diameter is enough to throw the code.

With a P0442, the most common repair is to:
  • 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, or
  • Inspect the EVAP system for cuts/holes in tubes/hoses
See this info for more links etc : OBD-II Trouble Code: P0442 Evaporative Emission Control System Leak Detected (small leak)
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Bretton65
Buick
3
01-24-2015 08:58 AM
jo7hs2
2000-2005
9
09-29-2007 12:25 PM
mk43
General GM Chat
2
09-23-2007 08:34 PM
bonniemaro
1992-1999
9
06-29-2006 07:49 AM
brian szelagowski
2000-2005
7
11-15-2005 08:51 AM



Quick Reply: Evap prob P0442



All times are GMT -4. The time now is 06:25 AM.