Review on 🚀 APDTY 022715 EGR Evaporative Emissions Vacuum Switching Solenoid Valve: Reliable and Efficient Solution by Jon Conner

Camry LE '96 2.2l. received P0401. I was almost certain this was a bad modulator since I couldn't evacuate the bottom port, but I bought it just in case. When I tested my old VSV it had a vacuum leak when the car was off so I replaced that too and everything seems fine, the P0401 has been gone for a few weeks now and the car runs better. See "sRjVDcvUYH8" on YouTube for troubleshooting tips. VSV Test: You will need a vacuum pump/gauge such as Harbor Freight 63391, a Dorman 47309 hose adapter, and a small length of vacuum hose. You can perform these tests when the engine is cold. First check if the EGR valve diaphragm can hold vacuum. Connect to the vacuum inlet of the EGR valve and create a vacuum and make sure the gauge is not moving. Release the vacuum and you should hear a click as the EGR valve closes. If it passes, remove the hose from the Q-port on the vacuum modulator and connect it to the hose. Pull out the vacuum and make sure it holds as in the previous test. When you release the vacuum you should hear the same ticking sound from the EGR valve as in the test above. Keeping the same hose connections as in the previous test, turn on the car (no need to start it, just turn the key to the "on" position). Now pull the vacuum again and make sure it holds, but when you release the vacuum you shouldn't hear the same ticking sound as in the tests above. If you do, it means your VSV is not good.