Learn how to test a charcoal canister for proper functionality.

How to test an EVAP charcoal canister

Learn how to test an EVAP fuel tank pressure (FTP) sensor: symptoms, common codes (P0452–P0453), expected voltages by make, and scan tool or multimeter steps.

Step-by-step EVAP FTP sensor test with voltages by make, scan tool and multimeter checks, and how to fix P0452/P0453 codes.

EVAP Fuel Tank Pressure (FTP) Sensor Test (2025) — Step-by-Step DIY for P0452–P0453

EVAP Fuel Tank Pressure (FTP) Sensor Test (2025) — Step-by-Step DIY for Codes P0452–P0453

Learn how to perform a smoke test to identify leaks in your cars EVAP system

Learn how to perform a smoke test to identify leaks in your cars EVAP system.

EVAP Purge/Seal Leak Test

A purge solenoid is a normally closed solenoid that controls the flow of engine vacuum to the EVAP system. It can through multiple DTCs including P0440, P0441, etc. Learn how to test a mechanical or electrical solenoid for proper functionality.

A purge solenoid is a normally- closed solenoid that controls the flow of engine vacuum to the EVAP system. Learn how to test a mechanical or electrical solenoid for proper functionality.

How to Test EVAP Purge Solenoid

How to test EVAP Purge Solenoid

A Vent solenoid is a normally open solenoid that closes when energized and seals the system when the EVAP monitor is running a leak test. Learn how to test this functionality.

How-Tos

EVAP System