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I have a 2015 z06 and when im below 1/4 tank i got the code P0446.
Anyone else who has experienced this problem? Or know what the problem is?
The gas tank isn't venting properly and there is too high of a vacuum in the tank. Could be your Evaporative Emission Cannister, Evap Cannister Solenoid Valve or Fuel Tank Pressure Sensor. Need access to special test tools to fault isolate.
A scan tool that can read fuel tank pressures and that can issue commands to the fuel system
CH-44284-2 Fuel Flapper Door Holder this might be your gas can fuel fill adapter
GE-41415-60 Capless Fuel Adapter
GE-41413-A Evaporative Emissions System Tester (EEST)
i have now changed the following parts and still the same problem: - Vapor Canister Purge Solenoid
- Vent Control Solenoid
- Pressue Sensor
- Hose/pipe from back of the engine to intake
i have now changed the following parts and still the same problem: - Vapor Canister Purge Solenoid
- Vent Control Solenoid
- Pressue Sensor
- Hose/pipe from back of the engine to intake
Where is the vent control solenoid located? I'm getting P0446 code on my 2016 C7.
Where is the vent control solenoid located? I'm getting P0446 code on my 2016 C7.
First you have to understand what sets that DTC…the EVAP Purge Solenoid opens and the Vent solenoid closes and once there is a certain vacuum in the tank the Vent Solenoid opens and the ECM is watching the vacuum decrease via the Fuel Tank Pressure Sensor as a voltage…if the vacuum doesn’t decrease to near atmospheric pressure the DTC sets….could be a bad vent valve but also a blockage in the EVAP cannister or maybe a bad fuel tank pressure sensor or partially stuck open purge valve keeping vacuum in the tank….without a factory level bidirectional scan tool you’ll only be guessing….the vent valve (#3) is located in the right rear wheel well area…seek out a diagnostic shop near you and don’t waste money shot gunning parts.
