Empowering Technicians P0446 Diagnostic Techniques Demystified

Share your videos with friends, family, and the world. Could be gas cap. Could be tank vent valve/filter. Fuel Recirc Charcoal canister. Or a hose gone bad and not holding vac/pres. All these MAY set ... I have a code p0446 for evap solenoid which is the solenoid mounted on the intake. does the code mean something is wrong with the solenoid itself? I have an 04 Crew cab with the I5. My CEL light is on and I get the P0446 code (Evaporative Emission System Vent Control Circuit). Code P0446 is a diagnostic trouble code (DTC) that indicates a problem with the evaporative emission control (EVAP) system vent control ... P0446 indicates an Evaporative Emission Control (EVAP) system vent control circuit malfunction. Typically, this indicates a faulty vent valve. You might not have a leak, but rather a constriction in the system. It could be a defective vent solenoid, a plugged canister, etc. Read this ... After a little research...looks like maybe the gas cap not on correctly...hopefully it is that simple anyway...will try that tonight, but any other advice will be ... ... po446, s10, system, trouble, truoble, vent · Subscribe. Related Topics. Blocked Up Evap Lines · Upper Air Vent Blocked? 2005 blazer 2 door / ... My vehicle: 2004 Suburban 2500 LT, 4x4, 8.1L engine, Whipple supercharger. Bought from original owner with 208000 miles.