P0446 AND P1133

[Flat6speed]

2000 base Boxster stick.  Running a little rough.  Got P0446 Shutoff valve activated (charcoal filter). And P1133 Multiplic mixture adopt (Lower load B2).  Any ideas????

 

Scott

[JFP in PA]

2000 base Boxster stick.  Running a little rough.  Got P0446 Shutoff valve activated (charcoal filter). And P1133 Multiplic mixture adopt (Lower load B2).  Any ideas????

 

Scott

 

P0446 is typically the EVAP system purge line is blocked, or the EVAP canister itself has high flow resistance.  Usually addressed by disconnecting the purge line and blowing it out with compressed air.

 

I think the actual code you are referring to when you say P1133 is actually P1130, which is for O2 sensor adaptation, idle range, bank 2, below limit.  If so, this code is indicating that your mixture is overly rich, usually due to a MAF signal problem, high fuel pressure, a leaking injector, or the EVAP purge valve hanging open.

[Flat6speed]

Schematic? Please sir. And thank you btw. 

[JFP in PA]

Schematic? Please sir. And thank you btw. 

[Flat6speed]

Where do I blow air in?

[Flat6speed]

And thank you again btw.

[JFP in PA]

Where do I blow air in?

 

You need to disconnect the long line under the intake at the purge valve (#1) and canister ends, then blow air through to clear it,  I would also check the valve itself, and they have been known to stick as well.

[Flat6speed]

I had trouble starting my car after refueling the other day.  Do you think I should look at my gas cap first?  It is aftermarket and I am not the original owner.

[JFP in PA]

While these cars are well known for not liking aftermarket gas caps, you should get a different code (large EVAP system leak) for a bad gas cap.

[Flat6speed]

Alright,  I'm going to try the cap first.  I will update what comes of this.  Thanks again for your help. 

 

Scott