In this video I talk about my experience in repairing the P0401 code by replacing the Vacuum Switching Valve (VSV) on my 1997 Land Cruiser. I use a VSV that is made for a Chrysler and install it a different location from the original VSV.
Dorman 911-850 Vacuum Switching Valve (VSV) (Amazon affiliate)
US: https://amzn.to/2mF63fk
UK: https://amzn.to/3dtrAzh
DE: https://amzn.to/2No71d4
AU: https://amzn.to/2VgHEOL
ODB-II Readers: https://amzn.to/2A4PDGB (Amazon Affiliate)
Tekton 14932 Ratchet: https://amzn.to/2LFT73w (Amazon Affiliate)
Land Cruiser Playlist: https://www.youtube.com/playlist?list=PLErU2HjQZ_ZNTNDledQZp3VLGsMo1W1fQ