p0440/0441/0446 twice

[reluctantmechanic]

Odd series on my mothers 99 camry - here's what happened.

Car has had about 350miles on it since new engine and trans - the other day, while starting it up, the check engine light came on...usually it goes off about a second after startup, but not this time.

When I ran the codes, it said it has 6 - p0440/0441/0446/0440/0441/0446

I reset the light, and she's put 250 more miles on it, with no codes.

I've read a few things from searching that would lead me to believe this is the canister....I was hoping someone with the same experience and codes could chime in if this has happened to them.

Thanks in advance!

[fenixus]

could be something simple as loose gas cap.

[reluctantmechanic]

Originally Posted by fenixus

could be something simple as loose gas cap.

sadly, no. Cap was tight, and bought about 1 year ago.

It's been 100 miles since I reset the light, and now it's back on.

but instead of listing them all twice, it only listed p0440 twice, 0441 and 0446

any ideas? thanks in advance

[Mister_Perkins]

oooooo Evap codes.

Well it seems there is a problem with the purge side of your EVAP system. Have you tried to check your system for leaks yet?

[reluctantmechanic]

Originally Posted by Mister_Perkins

oooooo Evap codes.

Well it seems there is a problem with the purge side of your EVAP system. Have you tried to check your system for leaks yet?

well, I'm not sure what the purge side is?

[Mister_Perkins]

Originally Posted by reluctantmechanic

well, I'm not sure what the purge side is?

purge side is the side that goes from the charcoal canister to the intake manifold to re-introduce the fuel vapors into the system..


Simple thing you can try to do ;

replace the line that goes from the charcoal canister to the intake manifold with a known good line. That may clear your code up

[reluctantmechanic]

Originally Posted by Mister_Perkins

purge side is the side that goes from the charcoal canister to the intake manifold to re-introduce the fuel vapors into the system..


Simple thing you can try to do ;

replace the line that goes from the charcoal canister to the intake manifold with a known good line. That may clear your code up

thanks Mr. Perkins, I'll give it a shot.

[Mister_Perkins]

Originally Posted by reluctantmechanic

thanks Mr. Perkins, I'll give it a shot.

Sure

The thing about these dang evap systems is they are very sensitive. even a pin-prick hole not noticeable to the eye can cause a code to show up

Now that I looked at the EVAP system for our vehicles, instead of the charcoal canister running to the Intake Manifold, it goes through the TvV first.

Goes Charcoal Canister > TvV > Intake Manifold


PM Sent

CHARCOAL CANISTER INSPECTION

1. REMOVE CHARCOAL CANISTER

2. VISUALLY INSPECT CHARCOAL CANISTER

Look for cracks or damage.

3. CHECK FOR CLOGGED FILTER AND STUCK CHECK
VALVE

(a) Using low pressure compressed air (4.71 kPa, 48
gf/cm2, 0.68 psi), blow into port A and check that air
flows without resistance from the other ports.

(b) Blow air (4.71 kPa, 48 gf/cm, 0.68 psi) into port B
and check that air does not flow from the other ports.
If a problem is found, replace the charcoal canister.

4. CLEAN FILTER IN CANISTER
Clean the filter by blowing 294 kPa (3 kgf/cm, 43 psi)
of compressed air into port A while holding port B
closed.

NOTICE:
• Do not attempt to wash the canister.
• No activated carbon should come out.

5. REINSTALL CHARCOAL CANISTER

[ontoy]

Reluctantmechanic,
Hey man, was this problem ever resolved, because i'm having the same fault code on my car with just the P0440 code. I've check all 3 VSV by connecting a 9v battery to it and all 3 of them make a clicking noise, so they should be good. I've also tried to find vacuum leaks but can't find any obvious leak in the system. I've also bought a new gas cap and clean the fuel filler neck, that was my first initial fix, but code came back on.

[camry6]

Originally Posted by ontoy

Reluctantmechanic,
Hey man, was this problem ever resolved, because i'm having the same fault code on my car with just the P0440 code. I've check all 3 VSV by connecting a 9v battery to it and all 3 of them make a clicking noise, so they should be good. I've also tried to find vacuum leaks but can't find any obvious leak in the system. I've also bought a new gas cap and clean the fuel filler neck, that was my first initial fix, but code came back on.

I'm not sure about the Camrys, but if you SQUEEZE your gas tank FULL, it can cause liquid gas (instead of vapors) to flow out into the evap system, charcoal cannister, purge valves and lines. This will give you the purge problem codes. This was the problem with my Lexus GS 430 when I first bought it. I just stopped SQUEEZING the tank full and had to keep resetting the CEL until the liquid gasoline dried out of the system. Perfect ever since! My Lexus ES 330 is not affected by SQUEEZING the tank full, that's why I also did it to my GS. This is common with the OBD II system, '93 and older with the OBD I won't have this problem as the evap is not nearly closely monitored. You may have a leak at the tank filler neck vent as well.

[ontoy]

Camry6,

Thanks for your quick reply, so what your saying is never to fill the gas tank and just stop pumping before the gas dispenser release itself when its full of gas. Another thing i notice is that when i open the gas cap there is no audible pressure. how would i check a leak at the tank filler neck, from what i can see there is no obvious hole or anything like that. Actually my car is a 2000 ES300.

[camry6]

Originally Posted by ontoy

Camry6,

Thanks for your quick reply, so what your saying is never to fill the gas tank and just stop pumping before the gas dispenser release itself when its full of gas. Another thing i notice is that when i open the gas cap there is no audible pressure. how would i check a leak at the tank filler neck, from what i can see there is no obvious hole or anything like that. Actually my car is a 2000 ES300.

When filling the tank, once the pump nozzle shuts off, just round it up to the next dollar. As for hearing pressure when removing the cap, this won't always happen. Not sure why, but I seem to get that after a long continuous drive, an hour or so. You may have a leak large enough to prevent any pressure from building in the tank. To check for leaks, its pretty much a "seek and find" situation. The gas cap and filler neck sealing surface was a good place to start. Out of curiosity, try putting a smear of petroleum jelly on the gas cap seal. This will stop any small seepage that MAY still exist around the filler neck opening.