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01-19-2006, 11:12 PM | #1 |
Scooby Newbie
Member#: 84340
Join Date: Apr 2005
Chapter/Region:
MAIC
Location: Parkersburg, WV
Vehicle:1999 Impreza Wagon AWD>FWD |
What to do: Reset ECU or Take to the shop?
As I was driving home yesterday night, my check engine light came on. I went to AutoZone have them scanned and a number show up as P0440, which is a Evaporative emission control system malfunction. The only thing I can think of that may of cause this is when I was working under the car to change the rear sway bar that I had to move the Canister to put in the heavy duty swaybar brackets. What should I do?
I have a 1999 Subaru Impreza OBS, 96,000 miles. Help would be great. THx Chad
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01-20-2006, 01:01 AM | #2 |
Scooby Guru
Member#: 58779
Join Date: Apr 2004
Chapter/Region:
MAIC
Location: The Skook
Vehicle:2015 Honda Fitbox 15 Legacy kid hauler |
Reset the ecu first. If it comes back THEN contemplate the shop.
Reset = free |
01-20-2006, 02:09 AM | #3 |
Scooby Specialist
Member#: 86849
Join Date: May 2005
Chapter/Region:
RMIC
Location: Salt Lake City, UT
Vehicle:2005 GMC Savana white |
im pretty sure a reset is going to do nothing. it will just take longer to figure out cuz then you have to take it thru at least 1 drive cycle. and im sure the light will come back on.
i had this same problem, reset the ECU, it came back on, took it to midas like 325342 times, they didnt help much (lack of intelligence). it went of after i had my buddy look at it. the second time it came on (2 weeks later) it was the gas cap. my .02 |
01-20-2006, 10:08 AM | #4 |
Scooby Newbie
Member#: 51141
Join Date: Dec 2003
Chapter/Region:
MWSOC
Location: SW Chicago
Vehicle:2013 WRX PBP |
It's worth a shot to reset the ecu. It's free and can't hurt anything.
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01-20-2006, 01:16 PM | #5 |
Scooby Guru
Member#: 22664
Join Date: Aug 2002
Location: north nj
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check that all the hoses are connected to the canister, it happened to me once that one fell off
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01-20-2006, 01:57 PM | #6 |
Scooby Specialist
Member#: 88322
Join Date: Jun 2005
Chapter/Region:
MWSOC
Location: Indianapolis, IN
Vehicle:2009 BMW 135i |
I'd just check all the connections, make sure the clamps are on, make sure your gas cap is on nice and tight, and reset it. 440 sounds like a general failure, not a specific leak, so I'd check the plugs on all the electrical connections as well. If you did not put the canister back into the stock location, I'd make sure you didn't mount it in a way that pinches any of the hoses. You may also want to check your fuses. You may have shorted something while working on it and just popped a fuse.
I don't think it is going to hurt to reset and wait out another drive cycle. It shouldn't make your car run poorly or dangerously as long as you aren't dripping gas or something. I'd get more in a hurry if you could smell gas. |
01-20-2006, 06:05 PM | #7 |
Scooby Specialist
Member#: 19540
Join Date: Jun 2002
Chapter/Region:
South East
Location: Palm Harbor, FL
Vehicle:2008 MS3 |
i'm surprised autozone dind't clear it for you. get it cleared & drive until it comes back then bring it to a shop or make sure everything is still connected back there where you were fooling around.
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01-20-2006, 10:33 PM | #8 |
Scooby Specialist
Member#: 63925
Join Date: Jun 2004
Chapter/Region:
NWIC
Location: Beaverton, Oregon
Vehicle:95 R33 / 06 WRX Dark Slvr / Crystal Slvr |
Look around the canister and anything you touched, make sure its all there and hooked up, you shouldn't have a check engine unless something is not connected...
i doubt the canister randomly went bad that same time you moved it. |
01-21-2006, 01:10 PM | #9 |
Scooby Newbie
Member#: 84340
Join Date: Apr 2005
Chapter/Region:
MAIC
Location: Parkersburg, WV
Vehicle:1999 Impreza Wagon AWD>FWD |
Thank for all info...I went ahead check the hose around the canister and reset the ECU. So far the check light hasn't came on!
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01-21-2006, 03:23 PM | #10 |
Scooby Specialist
Member#: 66934
Join Date: Jul 2004
Chapter/Region:
NWIC
Location: Seattle WA
Vehicle:2004 JBP FXT 2002 cammed OBS - RIP |
for the record....that cel code often means your gas cap is loose, or has some grit around the seal....
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01-22-2006, 07:03 PM | #11 |
Scooby Newbie
Member#: 84340
Join Date: Apr 2005
Chapter/Region:
MAIC
Location: Parkersburg, WV
Vehicle:1999 Impreza Wagon AWD>FWD |
Well...the check light came back on again, so I guess I will have to send it to the shop.
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02-11-2006, 11:12 PM | #12 |
Scooby Specialist
Member#: 390
Join Date: Oct 1999
Chapter/Region:
E. Canada
Location: Ottawa, Ontario, Canada
Vehicle:2020 Forester Sport Dark Grey |
I have the same code..... 3 times in 4 months.... one of my friends (subaru tech) sent me this:
those cars are also bad for the wires corroding at the canister a lil past the connector if you follow it where the 2 wires turn into one there always broken ,if your light comes on again check that easy fix too.hope that help at all .oh yeah ,another thing is go under the dash drivers side and connect the green connector ,turn the ignition on goto the canister and you hear a valve opening and closing opening and closing like a ticking noise if not the valve is seized ,thats another comun problem off the top of my head. In my case.... I'll check the connectors to see if the wire is corroded.... I change the gas cap a month or so ago. |
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