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Will code P0440 reset after problem fixed?? #4593051
12/03/17 01:29 PM
12/03/17 01:29 PM
Joined: Nov 2013
Posts: 66
York, Pa
fozzdesy2001 Offline OP
fozzdesy2001  Offline OP
Joined: Nov 2013
Posts: 66
York, Pa
I hope someone can tell me if evap code P0440 will reset without clearing all the OBDII ready codes first? My vapor canister vent valve/solenoid had a broken wire at the connector so wasn't getting power, this threw a "service engine soon light" of course. I would really like to avoid the complete drive cycle ritual if possible. The vehicle is a 1999 Isuzu Hombre (same as a Chevy S-10), 2.2, 5-speed, RWD, Pickup. I can reset the computer if I have to but it takes looong time with a lot of driving to get everything ready to test the evap part.


2001 Subaru Forester S
Replaced with a 2006 Forester

2004 Subaru Forester XT
Death by deer. Replaced with 2003 Impreza Outback Sport (beater)
Re: Will code P0440 reset after problem fixed?? [Re: fozzdesy2001] #4593055
12/03/17 01:32 PM
12/03/17 01:32 PM
Joined: Jan 2007
Posts: 17,501
Clovis, CA
Merkava_4 Offline
Merkava_4  Offline
Joined: Jan 2007
Posts: 17,501
Clovis, CA
Yes, the computer will eventually turn the light off and erase the code if the issue has been corrected.

Re: Will code P0440 reset after problem fixed?? [Re: fozzdesy2001] #4593083
12/03/17 02:06 PM
12/03/17 02:06 PM
Joined: Jun 2003
Posts: 33,595
ME
eljefino Offline
eljefino  Offline
Joined: Jun 2003
Posts: 33,595
ME
If you leave it alone, when the light goes out you'll say "aaaaah".

If you clear the code, you'll be obsessively checking your scan tool to see if the I/Ms clicked in yet.

Keep the tank between 1/4 and 3/4, that does more to help it than anything else.

Re: Will code P0440 reset after problem fixed?? [Re: fozzdesy2001] #4593109
12/03/17 02:32 PM
12/03/17 02:32 PM
Joined: Nov 2013
Posts: 66
York, Pa
fozzdesy2001 Offline OP
fozzdesy2001  Offline OP
Joined: Nov 2013
Posts: 66
York, Pa
Thanks, this is exactly what I wanted here. Awesome site!!


2001 Subaru Forester S
Replaced with a 2006 Forester

2004 Subaru Forester XT
Death by deer. Replaced with 2003 Impreza Outback Sport (beater)
Re: Will code P0440 reset after problem fixed?? [Re: eljefino] #4593166
12/03/17 03:43 PM
12/03/17 03:43 PM
Joined: Nov 2013
Posts: 66
York, Pa
fozzdesy2001 Offline OP
fozzdesy2001  Offline OP
Joined: Nov 2013
Posts: 66
York, Pa
WOW, that was fast! One cold start and one lukewarm start for a total of 10 miles and the light is OFF! YESSSSSS!!!!

Last edited by fozzdesy2001; 12/03/17 03:45 PM.

2001 Subaru Forester S
Replaced with a 2006 Forester

2004 Subaru Forester XT
Death by deer. Replaced with 2003 Impreza Outback Sport (beater)

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