'99 Camry P0446 Code

Reply
 
LinkBack Thread Tools Display Modes
Old 19 Sep 2009, 02:43 pm   #1 (permalink)
Sleepmac
Guest
  • Posts: n/a
  • User Status:


Default '99 Camry P0446 Code

99 Camry 4-cyl Auto 124,000 miles. The 'Check Engine' light came on
this week. I got an OBD II reader and it gave me the code P0446. That
is something in the Evap. Emission Control. I have the Service Manual.
The cchapter starts on DI-131 or something place like that. Obviously
I'm having trouble reconciling what is on those pages with actually
seeing what I'm supposed to see on the car. Where ought I to start
looking for the trouble? My gas filler cap is ok. :-) And what does VSV
stand for?

Thank you.

--
  Reply With Quote
Old 19 Sep 2009, 03:24 pm   #2 (permalink)
Sleepmac
Guest
  • Posts: n/a
  • User Status:


Default Re: '99 Camry P0446 Code

In article <190920091543076955%mac121sleep@yahoo.com>, Sleepmac
<mac121sleep@yahoo.com> wrote:

> 99 Camry 4-cyl Auto 124,000 miles. The 'Check Engine' light came on
> this week. I got an OBD II reader and it gave me the code P0446. That
> is something in the Evap. Emission Control. I have the Service Manual.
> The cchapter starts on DI-131 or something place like that. Obviously
> I'm having trouble reconciling what is on those pages with actually
> seeing what I'm supposed to see on the car. Where ought I to start
> looking for the trouble? My gas filler cap is ok. :-) And what does VSV
> stand for?
>
> Thank you.
>
> --


BTW, an addendum to the above: The OBD screen gave me "P0446, 1 of 1,
mod $10, Evap Control System, Vent Ckt Malfunction".
Is the reader telling me everything I ought to know? :-)

Thank you
  Reply With Quote
Old 19 Sep 2009, 06:19 pm   #3 (permalink)
John M. Darnielle
Guest
  • Posts: n/a
  • User Status:


Default Re: '99 Camry P0446 Code


"Sleepmac" <mac121sleep@yahoo.com> wrote in message
news:190920091624165113%mac121sleep@yahoo.com...
> In article <190920091543076955%mac121sleep@yahoo.com>, Sleepmac
> <mac121sleep@yahoo.com> wrote:
>
>> 99 Camry 4-cyl Auto 124,000 miles. The 'Check Engine' light came on
>> this week. I got an OBD II reader and it gave me the code P0446. That
>> is something in the Evap. Emission Control. I have the Service Manual.
>> The cchapter starts on DI-131 or something place like that. Obviously
>> I'm having trouble reconciling what is on those pages with actually
>> seeing what I'm supposed to see on the car. Where ought I to start
>> looking for the trouble? My gas filler cap is ok. :-) And what does VSV
>> stand for?
>>
>> Thank you.
>>
>> --

>
> BTW, an addendum to the above: The OBD screen gave me "P0446, 1 of 1,
> mod $10, Evap Control System, Vent Ckt Malfunction".
> Is the reader telling me everything I ought to know? :-)
>
> Thank you


VSV is vacuum Switch Valve. You could start buying parts.

I had the same thing two months ago on my '97and made it go away by wiggling
all the wires and connecting and disconnecting the plugs to the affected
components. I adjusted all the hoses and inspected everything. Then I
disconnected the battery to clear the code and the check engine light never
came back.

John

  Reply With Quote
Old 21 Sep 2009, 11:19 pm   #4 (permalink)
john
Guest
  • Posts: n/a
  • User Status:


Default Re: '99 Camry P0446 Code

I don't think the gas cap was the source of the Toytoa EVAP problems.
I think the main reason for these lights is the newly design system
back then is just not up to par. The carbon inside the canister can
disintegrate and the powder will plug up things. Like a vacuum
switching valve.

It's basically a vacuum switch that turns on/off a vacuum hose
circuit. Sometimes the plunger and stick and it won't switch to the
right circuit or properly turn on/off a circuit. Therefore setting off
the code.

Here is a good explanatin by Erndog1369:

06-26-2004, 02:38 PM
I have seen hundreds of P0446 codes on Camry like yours. 90% of the
time it is caused by a bad tank by-pass valve (VSV) on the charcoal
canister. You can check the valve by removing it and applying power to
one pin and ground to the other. The valve should click... you'll hear
it and feel it. Sometimes the valve sticks intermittently, and you may
not experience it when testing it.

The P0446 can also be caused by a bad Canister Control Valve located
on the air filter housing. You can test it the same way. This valve
turns on and kind of clicks rapidly when power and ground are applied.

There can also be a leak in the evaporative system. This is very
difficult to find, and you'd need special equiptment to test for a
leak. Your best bet is the dealer. They see the P0446 everyday, and
they'll be able to diagnose the problem relatively easily. Usually
they charge 1 hour labor to diagnose it. From there you can repair it
yourself if you want.
The EGR valve will NOT cause the P0446 code. The EGR system have a few
codes specific to it, like P0401.
Your problem is in the Evap. Emission System.


On Sep 19, 12:43*pm, Sleepmac <mac121sl...@yahoo.com> wrote:
> 99 Camry 4-cyl Auto 124,000 miles. The 'Check Engine' light came on
> this week. I got an OBD *II reader and it gave me the code P0446. That
> is something in the Evap. Emission Control. I have the Service Manual.
> The cchapter starts on DI-131 or something place like that. Obviously
> I'm having trouble reconciling what is on those pages with actually
> seeing what I'm supposed to see on the car. Where ought I to start
> looking for the trouble? My gas filler cap is ok. :-) And what does VSV
> stand for?
>
> Thank you.
>
> --


  Reply With Quote
Old 22 Sep 2009, 01:34 pm   #5 (permalink)
ycleptor2@sc.com
Guest
  • Posts: n/a
  • User Status:


Default Re: '99 Camry P0446 Code

On Sep 19, 3:43 pm, Sleepmac <mac121sl...@yahoo.com> wrote:
> 99 Camry 4-cyl Auto 124,000 miles. The 'Check Engine' light came on
> this week. I got an OBD II reader and it gave me the code P0446. That
> is something in the Evap. Emission Control. I have the Service Manual.
> The cchapter starts on DI-131 or something place like that. Obviously
> I'm having trouble reconciling what is on those pages with actually
> seeing what I'm supposed to see on the car. Where ought I to start
> looking for the trouble? My gas filler cap is ok. :-) And what does VSV
> stand for?
>
> Thank you.
>
> --


Check the vsv on the Intake (air filter box) first. It's on the back
of the air filter box and It's the easiest to get to. The removable
one on the charcoal cannister is easiest to get to with the car on
ramps. The bracket it is mounted to is held on with a tiny phillips
head. Soak it in PBBlaster or Liquid Wrench and see if you can get it
off to test. The vsvs run about $60 each. You can reset the codes and
continue to drive. They don't affect performance, but they will get
you in trouble in an emissions inspection.

Cheers,

MD
  Reply With Quote
Old 22 Sep 2009, 06:05 pm   #6 (permalink)
Sleepmac
Guest
  • Posts: n/a
  • User Status:


Default Re: '99 Camry P0446 Code

In article
<66d9bbe3-1772-4f09-8099-5f15372cd648@33g2000vbe.googlegroups.com>,
<"ycleptor2@sc.com"> wrote:

> On Sep 19, 3:43 pm, Sleepmac <mac121sl...@yahoo.com> wrote:
> > 99 Camry 4-cyl Auto 124,000 miles. The 'Check Engine' light came on
> > this week. I got an OBD II reader and it gave me the code P0446. That
> > is something in the Evap. Emission Control. I have the Service Manual.
> > The cchapter starts on DI-131 or something place like that. Obviously
> > I'm having trouble reconciling what is on those pages with actually
> > seeing what I'm supposed to see on the car. Where ought I to start
> > looking for the trouble? My gas filler cap is ok. :-) And what does VSV
> > stand for?
> >
> > Thank you.
> >
> > --

>
> Check the vsv on the Intake (air filter box) first. It's on the back
> of the air filter box and It's the easiest to get to. The removable
> one on the charcoal cannister is easiest to get to with the car on
> ramps. The bracket it is mounted to is held on with a tiny phillips
> head. Soak it in PBBlaster or Liquid Wrench and see if you can get it
> off to test. The vsvs run about $60 each. You can reset the codes and
> continue to drive. They don't affect performance, but they will get
> you in trouble in an emissions inspection.
>
> Cheers,
>
> MD


Many thanks to the guidance I've received from all 3 replies. Gives me
a good place to start. It shouldn't take me too long to run through the
possibilities.

Dan
  Reply With Quote

Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On



All times are GMT -5. The time now is 04:09 pm.

Attribution:
Autoblog
Powered by Yahoo Answers



ToyotaLexusForum.com is an unofficial community for car enthusiasts. ToyotaLexusForum.com is not affiliated with Toyota Motor Corporation in any way.
Toyota Motor Corporation does not sponsor, support, or endorse ToyotaLexusForum.com in any way.
Copyright/trademark/sales mark infringements are not intended or implied.