Hi
My car had check engine light on
I had checked it via diagnosis system, it shows code PO 446
Does any one knows what that mean ?? And how. To repair it

Regards

 

Dude, If u even bothered to search u would have seen that it has to do with your evap system. Check your hoses for leaks, if that's good it's prolly your charcoal canister

 

http://www.obd-codes.com/p0446

Google man, found it in about 15 seconds...
the link should give you some insight..

 

Had it happen to me before need it to get fix to pass inspection it's the charcoal canister it's a big square canister under rear of car near exhaust looks like black shoe box

 

Thanks for reply mate
But Which Hoses ? The air hose ( breathing hose ) or evap hoses
And is there any cosiqurnces of I ignore it ?

Regards

 

Thanks a lot brother

 

Yes, the evap lines. When I had that code, in the engine bay driver side, I had an evap hose that had disconnected. I just put it back on and the engine light went away. You would fail emissions if u didn't fix it

 

vent solenoid is sticking. time for a new one.

 

It could be a number of things, most have already been mentioned. I would start with the least expensive items first. Replace the gas cap, use OEM. Then I would check for a faulty or loose evap hose. Check the ones under the hood first. Follow the hose all the way to the canister. The hose connected to the canister had worked its way loose when I was getting that code. If that doesn't work, next I would replace the solenoid that is on the canister. If those things don't work, then I would replace the canister. It's the most expensive part and it is just as likely some of those other things as it is the canister.

Other than failing to pass inspection, it will not harm the car if it is not corrected.

 

I've been too lazy to attempt the long hours to fix, I've had that code for about 3 years now... Car runs fine, just gonna get very bad gas mileage. However, most likely its a sticky valve, the canister itself usually is fine, theres a write up on how to do the exchange, it requires dropping the differential though to get to it. Here's the parts:

http://lexus.sewellparts.com/oem-cat...S400-2000.html

 

no need to drop the differential...

 

Thanks millions for this comprehensive details

 

had the same code Just replaced my evap and passed smog also

 

This post has the service and diagnostics pdf.

https://www.clublexus.com/forums/gs-...0446-evap.html

it's too easy to think everyone else's problem is your problem. and it's too hard to re-write like a checklist of things to check, when you may forget and miss one.

 

just a p0441 code means your VSV is "Open" check your evap line going to the VSV.

just a p0446 code means charcoal canister is stuck closed.

sounds like a clogged charcoal canister.

http://www.eecis.udel.edu/~davis/070...b/LexusVSV.pdf