Toyota Po441, P0446 EVAP Vacuum Switching Valve VSV Testing and Canister Replacement

http://www.wellsve.com/ This video demonstrates how to test for a Toyota EVAP code p0446. How to also test an early vacuum switching valve and replace the canister.

"The information presented in this program is based on a specific diagnostic case and might not directly apply to the vehicle you are repairing. We do not represent or warrant that the information presented is complete or error free. Please take all safety precautions. We disclaim any and all liability for losses, injuries or damages in connection with your repair."

Category:

Autos & Vehicles

Tags:

• Toyota
• Po446
• P0446
• VSV
• Vacuum Switching Valve
• EVAP
• Canister
• automobiles
• repair
• installation
• engine

[mcleod2]

ok so i went to toyota and they said i need a new purge valve and canister. I dont want to buy the part from toyota, instead i want to get it from advance, they typically dont carry it in that title but they say they have a purge valve solenoid is this the same thing?

[markjhicks]

@mcleod2 The purge solenoid, I would think is the same as the purge valve. However, some manufacturers call out different names. I would check with whoever you are buying the part from to be sure.

Mark Hicks

Wells Vehicle Electronics

[mcleod2]

thank u

[markjhicks]

@xx217xx Yes, it can happen and it is not unusual with an EVAP code. However, the code is still stored in the history even if the light goes out.

Mark Hicks

Wells Vehicle Electronics

[xx217xx]

@markjhicks Can the check engine light be intermittent? Because I scanned the car when the check engine light was on and turned the car off and unlugged it. I didn't delete the code. The next day I turned the car on to park in my garage to take the canister out, the check engine light wasn't on

[markjhicks]

@markjhicks

3. If both solenoids operate correctly and are not sticking, inspect for a restriction in the Evaporative Emission (EVAP) lines that could affect how the canister vents after a leak test is performed.

4. Verify that the fuel cap is a good seal. If the fuel cap leaks or does not hold the correct amount of vacuum when the system checks for a leak, all the codes will set.

Stay in touch

Mark Hicks

Wells Vehicle Electronics

[markjhicks]

@markjhicks

This is a normally closed (N.C.) valve. When energized, it should open. When de-energized, an internal spring should close the valve.

2. Verify that the canister closed valve (located on the air filter housing) closes and does not stick closed when operated. This is a normally open (N.O.) valve. When it is grounded, it closes, and it should never stick closed.

[markjhicks]

@xx217xx It means the solenoid is activating, but you still must make sure it holds and passes vacuum like it shows in the video. By far the most common cause for these codes on your vehicle are either a bad gas cap or canister. Here are some more instructions I hope will help you determine the anser to the problem:

1. Verify that the Vacuum Switching Valve (VSV) for the pressure sensor (located on the canister) operates correctly.

[xx217xx]

My 2001 Toyota Camry LE gave out codes P0440, P0441, P0446. I took out my canister and did the battery voltage test, and I heard the noise from the solenoid, so does that mean that the canister is still good? If it's still good, what may be causing the problem?

[sidmalicious]

@xtwillox Thanks. That's next, or at least donuts to make sure those aren't rotted.