P0446 CEL code
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Driver School Candidate
Joined: Oct 2010
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From: New Jersey
P0446 CEL code
I am getting a P0446 code (Not getting a P0441). I assume this most likely means a bad EGR Vacuum Solenoid. I'd like to test it but can't find it
Can anyone tell me where the EGR Vacuum Solenoid is located on a 2000 RX300?
Thanks
Can anyone tell me where the EGR Vacuum Solenoid is located on a 2000 RX300?
Thanks
Racer
Joined: Oct 2009
Posts: 1,298
Likes: 323
From: nj
P0446 is "Evap vent control fault"
The diagnosis procedure for P0446 is pretty much the same as P0441.
Listed causes are
The diagnosis procedure for P0446 is pretty much the same as P0441.
Listed causes are
- Open or short in vapor sensor VSV circuit
- Open or short in EVAP VSV circuit
- Open or short curcuit in vapor pressure sensor circuit
- Faulty VSV for EVAP system
- Faulty vapor pressure sensor VSV
- Faulty vapor pressure sensor
- Disconnected, cracked, damaged, or blocked vacuum hose
- Faulty charcoal canister
Instructor
Joined: Jan 2006
Posts: 1,016
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From: Virginia
I experienced this several years ago on my 99 AWD RX. I suggest that you closely inspect your charcoal cannister assembly (in the rear, under the floor and beside the spare tire well) for rotten vacuum hoses.
Racer
Joined: Oct 2009
Posts: 1,298
Likes: 323
From: nj
I only see one VSV identified as EVAP VSV. The one on the canister is called the "VSV for Pressure Switching Valve". Here's another view.
While the code indicates it is the EVAP VSV the procedure seems to be to test everything.
Thread Starter
Driver School Candidate
Joined: Oct 2010
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From: New Jersey
So I took off the casing covering the canister and am posting the following photos. The last photo shows on the right two hoses which are not attached to anything. Should either of them be? Otherwise all the hoses look ok. I will remove the two small hoses connected to the Vacuum Solenoid (top picture) and test it using a 9 volt battering with two jumper cables. My understanding is if it is functioning correctly, I should hear a clicking noise. Any other thoughts would be greatly appreciated..
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Racer
Joined: Oct 2009
Posts: 1,298
Likes: 323
From: nj
I'm pretty sure the disconnected hoses are normal.
The 'click' means the solenoid works but doesn't prove the valve is good. A vacuum tester (can borrow kit from AdvanceAuto) can test out the hoses and valves.
This post has the test procedure for the canister
https://www.clublexus.com/forums/rx-...ml#post2218270
The 'click' means the solenoid works but doesn't prove the valve is good. A vacuum tester (can borrow kit from AdvanceAuto) can test out the hoses and valves.
This post has the test procedure for the canister
https://www.clublexus.com/forums/rx-...ml#post2218270
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Thread Starter
Driver School Candidate
Joined: Oct 2010
Posts: 9
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From: New Jersey
Thanks Max Steel. I just disconnected the two hoses connected to the solenoid, clipped the jumper cables to it and listened for a click. No clicking at all so I will have to order one. As I have everything opened up now I'll also test for vacuum in the hoses.
Does this OEM number look right? 9091012150, 9091012196
Does this OEM number look right? 9091012150, 9091012196
Thread Starter
Driver School Candidate
Joined: Oct 2010
Posts: 9
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From: New Jersey
So I found both valves. The first which is located on the fuel bar beneath the engine cover. After removing the hoses and connecting the cables to this valve and a battery, it clicked repeatedly it seemed fine. Tomorrow I will test Vacuum in the hoses. However, as MaxSteel and Salimshah discussed, there is another valve located next to the canister (which is under the spare tire) I think it is called a canister purge switching valve. When performing the same test on this valve, it made no clicking sound. I think this valve is shot.
I am trying to find the part number for the Canister purge switching valve, but only seem to be able to find the part number for the valve connected to the fuel bar under the hood.
If anyone could help with the part number that would be great. Thanks to you all.
I am trying to find the part number for the Canister purge switching valve, but only seem to be able to find the part number for the valve connected to the fuel bar under the hood.
If anyone could help with the part number that would be great. Thanks to you all.
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