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- - Check Engine P0446 (https://mitsubishiforum.com/forum/2nd-generation-63/check-engine-p0446-24018/)

Check Engine P0446

Hi guys. This is a tough one so I am reaching out to the rest of the Eclipse owners out there. Maybe some of you have experienced the same error and can shed some light on how to troubleshoot and hopefully repair it. I have a 1999 Eclipse GS-T and the Check Engine light turned on. I ran a scan tool and it returned the following:

P0446 Evaporative Emission Control System Vent Control Valve Circuit

I used the tool to clear the alert just in case it was a false positive but the alert came back after restarting the car once or twice. Searching the web, the only insightful info that I found was trying to replace the gas cap. I haven't tried that yet but I find it hard to believe that it is a bad gas cap.

If anyone has any experience with this or can point me in the right direction I would greatly appreciate it.

RE: Check Engine P0446

Did the light by chance come on after you recently filled up with gas? I threw a a different code "Fuel trim malfunction" and it was the gas cap so its a possible place to start. Cap is about $8 from Autozone.

RE: Check Engine P0446

Natedogg,

Thanks for the reply. I don't recall the light coming on after a gas filling. I just recall turning it on after leaving a friend's house and the light popped up.My gut feeling tells me that it is not the gas cap but something else. I guess for $8 it is worth a try. I'll post again after I replace the cap.

Thanks again..!

RE: Check Engine P0446

Quote:

ORIGINAL: Cars4Kix

Hi guys. This is a tough one so I am reaching out to the rest of the Eclipse owners out there. Maybe some of you have experienced the same error and can shed some light on how to troubleshoot and hopefully repair it. I have a 1999 Eclipse GS-T and the Check Engine light turned on. I ran a scan tool and it returned the following:

P0446 Evaporative Emission Control System Vent Control Valve Circuit

I used the tool to clear the alert just in case it was a false positive but the alert came back after restarting the car once or twice. Searching the web, the only insightful info that I found was trying to replace the gas cap. I haven't tried that yet but I find it hard to believe that it is a bad gas cap.

If anyone has any experience with this or can point me in the right direction I would greatly appreciate it.

You probably have a vaccuum leak somewhere and what they are saying by "replacing the gas cap" is that the seal could be bad...Also check for a vaccuum leak around the little valve near the gas tank...The scan tool is just going to tell you just what the "general" problem is and maybe not the exact thing that is wrong...my guess is that you have a vaccuum leak somewhere with the fuel system and vaccuum leaks can be a pain in the azz to find.

RE: Check Engine P0446

It has to do with your EVAP system. Its either gonna be a bad EVAP canister or its gonna be EVAP vent lines clogged or the EVAP sensor is bad. Here is a diagram of the system
Attachment 9588

your best bet is to bring it to someone who would know how to inspect these parts

RE: Check Engine P0446

That looks like a fun mess to get into :eek:

RE: Check Engine P0446

well theres always a way to clean it up by removing emmisions like so
Attachment 9586

this is of course not smog legal but hey, its cleaner right :D

I am pulling the same code and have the same vehicle, replaced gas cap and the vent valve and the vent solenoid. Any other suggestions.

Quote:

Originally Posted by moho9000t (Post 304562)

I am pulling the same code and have the same vehicle, replaced gas cap and the vent valve and the vent solenoid. Any other suggestions.

I'm just starting to look at this code on my 07 outlander LS. Did you solve the problem. My first place to look is the Vent Solenoid. Do you know where that is located on the car?

Thanks.