Evap canister on '99 Forester

anthonyg_maJune 7, 2010

I've been seeing a steady MIL illuminated for a few weeks now, so I picked up an inexpensive OBDII reader and pulled a code of 'P0440' from the on-board computer. The gas cap appears to be fine, and tight, so I was hoping to follow along the rest of the EVAP diagnostic and see what's wrong. Any suggestions as to where to look under the hood for the canister?

Thanks in advance!

Thank you for reporting this comment. Undo
exgm

I don't know this vehicle well enough to say, but does the emissions decal under the hood yield any info on it?

    Bookmark   June 7, 2010 at 10:07PM
Thank you for reporting this comment. Undo
john_g

A P0440 is a general evaporative emissions system failure, otherwise knows as a weak vacuum test on some manufacturers. The computer commands the purge valve open with the engine running, the vent valve closed to seal the system and then the computer watches the fuel tank vapor pressure sensor to see if it measures about 8" of water vacuum in the canister and fuel tank. if that level of vacuum cannot be achieved, the system cannot test itself for leaks, and that results in the P0440.

    Bookmark   June 7, 2010 at 11:00PM
Sign Up to comment
More Discussions
Dying transmission question
I have a 2001 Honda Odyssey that has served me well...
catherinet
Cost to replace a 99 Buick head Gasket
My grandson 99 Buick blew a head gasket after the thermostat...
iggie
dump my buick rendezvous?
Do you know the Buick Rendezvous? Mine has been outstanding...
handywidow
Tire Question
I have a 2007 Honda Ridgeline with 13,000 miles (yes,...
momrox4
car alarm going off at odd times
We have a Hyundai that suddenly decided the entire...
Chickey Wingz
Sponsored Products
Canova River Blue Blackout Window Valance
$11.95 | Bellacor
Retro Bar Stool in White
$99.00 | LexMod
Pixel Forest Giclee Brushed Nickel Garth Floor Lamp
Lamps Plus
Jade Olive Green Professional Yoga Mat - 368OL
$62.95 | Hayneedle
Patio Living Concepts Outdoor Lighting. Seaside Outdoor 34 in. Bronze Table Lamp
Home Depot
Solid 63 Inch Insulated Thermal Blackout Panel Pair
Overstock.com
© 2015 Houzz Inc. Houzz® The new way to design your home™