P0446 Code A Step-by-Step Guide to Troubleshooting and Repair

My engine light came on for this problem (P0446) Evaporative Emission System Vent Control Circuit... additionally i cant seem to pump more that about $.35 worth ... Unlikely a bad charcoal canister but possible. P0446 would NOT set for a loose gas cap. A loose gas cap would set an EVAP Small Leak code while ... Chased around a P0446 code for a week and finally fixed it today. 1. Replaced gas cap - code came back 2. Replaced Vent valve - $30 - code came back 3. Took ... The P0446 error code signifies a problem with the evaporative emission control (EVAP) system's vent control circuit. P0440, P0442, and P0446 are all EVAP related codes that are the inverse of one another. One is for not being able to maintain pressure and decay at a ... The code P0446 is set when the engine computer recognizes a fault or restriction at the vent control part of the Evaporative emission control system (EVAP). P0446 means the vent valve in the EVAP system is malfunctioning. Our expert mobile mechanics can diagnose and fix your P0446 trouble code wherever you are. Code P0446 relates to the Evap. ShutoffValve which is located under the truck near the spare tire. Read the information in the pdf and decide if ... The P0446 codes triggered when an improper voltage signal is sent to Engine Control Module (ECM) through EVAP canister vent control valve. I had a check engine light with P0446 code and no hiss when opening the gas cap so I started with changing the gas cap - no change