Description: Vacuum Switching; Vacuum Switching, No. 1. Fits 4Runner, Tacoma EVAP Purge Control Solenoid - Repair or ReplaceA failed evap purge solenoid in your vehicle's evaporative emissions system will often have no noticeable symptoms beyond a check Engine light, but it does cause your Toyota to operate inefficiently and produce higher emissions. Our technicians have Access to manufacturer-approved repair processes and Toyota genuine parts. Location-Engine Bay.