Symptoms

- Engine Light ON (or Service Engine Soon Warning Light) - Possible a noticeable fuel odor caused by the release of fuel vapors

Possible Causes

-
EVAP canister purge volume control solenoid valve stuck closed - EVAP control system pressure sensor and the circuit
- Loose, disconnected or improper connection of rubber tube -
Blocked rubber tube -
Cracked EVAP canister
- EVAP canister purge volume control solenoid valve circuit -
Accelerator pedal position sensor
- Blocked purge port
- EVAP canister vent control valve

When Detected

EVAP control system does not operate properly, EVAP control system has a leak between intake manifold and EVAP control system pressure sensor.

Description

In this evaporative emission (EVAP) control system, purge flow occurs during non-closed throttle conditions. Purge volume is related to air intake volume. Under normal purge conditions (non-closed throttle), the EVAP canister purge volume control solenoid valve is open to admit purge flow. Purge flow exposes the EVAP control system pressure sensor to intake manifold vacuum.