P0446 Code The Ultimate Guide to Diagnosis and Resolution

The P0446 code on a Chevy Silverado signals a problem with the EVAP system vent control circuit, usually due to a faulty vent control valve, ... CEL came on a week after removing my throttle body to clean it, code P0446. - No vacuum leaks - Verified evap canister vent valve is ... A P0446 is not a code that points to a specific problem, rather it indicates a voltage irregularity in the EVAP vent control circuit. The P0446 codes triggered when an improper voltage signal is sent to Engine Control Module (ECM) through EVAP canister vent control valve. P0446 is a result of a test failure. The PCM closes the vent solenoid and opens the purge valve. It then monitors the fuel tank pressure sensor. What is a P0446 Code? Better yet, what the heck is a Evaporative Emission System Vent Control Circuit? Well I ran into this problem with my ... if by some chance the gas cap is causing an issue that would throw a different p code. p0446 relates to the valve you could waste time ... General Technical & Electrical - P0446 EVAP Vent Control Circuit - Hey everyone! My 2007 2.3L gave a code P0446 : Evaporative Emission ... the po446 dtc is checking for a blocked evap path. it does this by commanding the purge valve open and watching for vacuum build up from the ... P0446 Evaporative Emission Control System Vent Control Malfunction · Navbar Menu · P0446 Evaporative Emission Control System Vent Control ...