City codes:
7.96.010 through 7.96.040 mobile living units (motor homes)
Also: 8.40.120 sleeping/living in vehicle.

It's pretty clear that living or sleeping in any vehicle is simply not allowed. You will need to call in on this every day to get any response from enforcement. It took me over three months to get rid of a couple living in a motorhome. Eventually had to contact the Mayor and city council members to get action.

thanks for info.

Thank you for reporting! A Code Enforcement Officer has now been assigned to inspect the possible violation(s). You may visit eTRAKiT, our online tracking system, to view current case information for the Code Violations online at http://web.ci.vallejo.ca.us/eTRAKiT3/ (please allow several business days for the information to upload). SeeClickFix is one of the many tools available to the citizens of Vallejo to report non-emergency issues. We “close” an issue in SeeClickFix once we've acknowledged the complaint; however, this issue is not "Closed" per se; it will remain an "Open" case with us until it is corrected. If there is anything else we can assist you with, please let us know. Thank you for using SeeClickFix!