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Symptoms of a Bad EVAP Vent Valve Solenoid and how Test if it Has Failed

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Added by MiAmigo
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Common symptoms of a bad EVAP Canister Vent Valve Solenoid and how to troubleshoot a bad vent valve.
Why Does the Gas Pump Keeps Clicking Off Video
https://youtu.be/t_nSVNa-48c

What is the EVAP Canister Vent Valve?
The vent valve controls the flow of air into and out of the EVAP system. It is also used by the computer (ECM) to test the EVAP system for leaks.

Symptoms of a Bad EVAP Vent Valve Solenoid
⦁ Check Engine Light is on
⦁ Fuel Smell
⦁ Gas Pump Clicks Off When Fueling Up
⦁ Pressure in the Gas Tank
⦁ Failed Emissions Test

When the vent valve fails, it will become stuck open or closed.
How To Troubleshoot a Bad EVAP Vent Valve
⦁ Scan for OBDII Error Codes
⦁ Test Vent Valve is Opening and Shutting
⦁ Smoke Test
⦁ Check Wiring
⦁ Check for Clogged Ports Lines

OBDII Codes for a Bad EVAP Vent Valve
⦁ P0455 - Large leak in the EVAP system detected
⦁ P0449 - Evaporative Emission System Vent Valve/Solenoid Circuit

Components with Similar Symptoms
⦁ Wiring or Blown Fuse
⦁ Clogged Hoses
⦁ Clogged Charcoal Canister

www.backyardmechanic.org
By using the information in the video user assumes all risk of use.
By using this information user assumes all risk of use.
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