P0440 code agggghhhh!
#1
Registered User
Thread Starter
Join Date: Jul 2004
Location: Jupiter, FL
Posts: 1,921
Likes: 0
Received 0 Likes
on
0 Posts
P0440 code agggghhhh!
Guys, I keep throwing a P0440 code and am coming up short as to why. I know it's either exhaust, emission circulation, or the gas cap. Has anyone else had this issue. It comes on once or twice a week until I clear it.
A
A
#2
Contributing Member
Join Date: Jul 2002
Location: Colorado
Posts: 1,358
Likes: 0
Received 0 Likes
on
0 Posts
If you don't have it already I can send you the diagnostic section referenced below. PM me your e-mail addy.
Last edited by Bighead; 08-18-2010 at 06:18 AM.
#4
Registered User
Thread Starter
Join Date: Jul 2004
Location: Jupiter, FL
Posts: 1,921
Likes: 0
Received 0 Likes
on
0 Posts
Well I replaced the gas cap and still getting a p0440 and a p0442 code, when I have some time I'll take it all apart and check it out. I thought about the recent last 13k motor swap and wondered if something may be loose on the motor side, though I never smell fuel. Any ideas?
A
A
#5
Contributing Member
I get P0440, P0442, and P0446 every week or so. It's been going on for at least six months, so I just keep my code reader in the truck and clear the damn things.
I think my issue may have to do with one of the solenoids near the charcoal canister.
Andreas
I think my issue may have to do with one of the solenoids near the charcoal canister.
Andreas
#6
Yeah my Runner throws this code all the time and I've replaced the gas cap and checked the charcoal canister hoses and all seems to be well and I don't smell fuel so I've just been clearing it.
#7
Registered User
Thread Starter
Join Date: Jul 2004
Location: Jupiter, FL
Posts: 1,921
Likes: 0
Received 0 Likes
on
0 Posts
I don't think clearing it in necessarily the best thing, as it isn't fixing a common problem. I'm guessing toyota may be able to better determine what is wrong with a thorough analysis?
A
A
Last edited by xcmountain80; 10-15-2010 at 05:24 AM.
Trending Topics
#9
Registered User
Some folks have gotten P0440 codes due to a rusty filler neck. P0446 should be either the VSV's or the sensor itself. FSM has trouble shooting procedure.
#11
#14
Registered User
P0440 large leak. You actually got the screws out of the Vacuum Shut Valve (canister shut valve) without breaking them off? Is the valve is on the side of the evap canister? You are a god. Without smoke it's tough. All of the time it gets a canister, I don't even attempt to remove screws.
#15
Registered User
Thread Starter
Join Date: Jul 2004
Location: Jupiter, FL
Posts: 1,921
Likes: 0
Received 0 Likes
on
0 Posts
P0440 large leak. You actually got the screws out of the Vacuum Shut Valve (canister shut valve) without breaking them off? Is the valve is on the side of the evap canister? You are a god. Without smoke it's tough. All of the time it gets a canister, I don't even attempt to remove screws.
A
#16
My 2001 is also throwing out a P0440 code. Gas cap replaced but I really dont want to mess with troubleshooting. Does anyone know how to bypass the system so the CEL doesn't come on and I can pass emissions? I know that sometimes resistors can be put in place of a sensor to trick the ecu. I would like to do something like this so I never have to worry about the evap system again.
#17
Registered User
Thread Starter
Join Date: Jul 2004
Location: Jupiter, FL
Posts: 1,921
Likes: 0
Received 0 Likes
on
0 Posts
I replaced my Charcoal canister out of desperation and the code is gone, the gas cap keeps throwing the lights on occasion but its nothing like have the CEL and vsc lights on for over 100K.
Aaron
Aaron
#18
Contributing Member
I've been dealing with this BS for more than two years, so last week I installed a new Toyota gas cap. No change. Check Engine/VSC/TRAC lights back on shortly thereafter.
I have a ScanGauge permanently mounted in the truck, so I can erase these codes on the fly. Unfortunately, my emissions test is due by middle December and there is no way I'll pass with the frequency that these codes appear.
So today I bit the bullet, hard, and ordered a charcoal canister assembly from Camelback Toyota for $327, shipped. My local dealer, from whom I've purchased parts for 12+ years, wanted $500. Jesus.
I keeping my fingers crossed that this solves the issue...
Andreas
I have a ScanGauge permanently mounted in the truck, so I can erase these codes on the fly. Unfortunately, my emissions test is due by middle December and there is no way I'll pass with the frequency that these codes appear.
So today I bit the bullet, hard, and ordered a charcoal canister assembly from Camelback Toyota for $327, shipped. My local dealer, from whom I've purchased parts for 12+ years, wanted $500. Jesus.
I keeping my fingers crossed that this solves the issue...
Andreas
Last edited by aowRS; 11-17-2013 at 03:27 AM.
#19
Contributing Member
My brand-spanking-new charcoal canister arrived yesterday. I intend to install it tomorrow...
Over the last few weeks I've installed a new gas cap, replaced the failing gasket between both cats, replaced the o2 sensor, and replaced the air/fuel sensor (or whatever the one in front of the cats is called).
I hope this alleviates the issue.
Andreas
Over the last few weeks I've installed a new gas cap, replaced the failing gasket between both cats, replaced the o2 sensor, and replaced the air/fuel sensor (or whatever the one in front of the cats is called).
I hope this alleviates the issue.
Andreas
#20
Contributing Member
I spent about an hour this morning installing the new charcoal canister (part# 77740-35482). I backed the truck onto a set of ramps and removed the spare to gain access. There are four 12mm bolts to remove, one electrical connection, and five hose connections. The three hoses that face forward were a bit tricky to access, but all in all, not a terribly difficult job.
I kept the battery disconnected during the work and then drove the truck around the block. For the Hell of it. I guess I'll need to drive it a week or so in order for the readiness monitors to reset.
After three years of intermittently getting P0440, P0420, and P0446, I hope that this is it for awhile. Within the last few weeks, I've also replaced both exhaust sensors, an exhaust gasket, and the gas cap.
Andreas
I kept the battery disconnected during the work and then drove the truck around the block. For the Hell of it. I guess I'll need to drive it a week or so in order for the readiness monitors to reset.
After three years of intermittently getting P0440, P0420, and P0446, I hope that this is it for awhile. Within the last few weeks, I've also replaced both exhaust sensors, an exhaust gasket, and the gas cap.
Andreas
Last edited by aowRS; 11-19-2013 at 11:23 AM.