P2446 low

EVAP Emission System Vent Control Circuit/Open

The P2446 code means the vehicle's onboard diagnostic system has detected: EVAP Emission System Vent Control Circuit/Open. This is a low severity code.

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Keep driving?: Yes, but fix soon
DIY difficulty: moderate
Estimated cost: $80 - $300 (parts and labor)

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Common Symptoms

Check Engine Light on
Fuel tank may not vent properly
Difficulty refueling
Fuel odor from vehicle
Failed emissions test

Probable Causes (Ranked by Likelihood)

Failed EVAP vent solenoid valve Very High
Vent solenoid filter clogged with debris High
Wiring damage to vent solenoid Moderate
ECM vent solenoid driver fault Low

Step-by-Step Diagnostic Procedure

Test EVAP vent solenoid with scan tool bidirectional control
Inspect vent solenoid filter for debris
Measure vent solenoid resistance
Check wiring and connector at vent solenoid

Frequently Asked Questions

What does P2446 mean?

P2446 indicates: EVAP Emission System Vent Control Circuit/Open. The ECM detected an issue that needs diagnosis and repair.

Is P2446 urgent?

EVAP codes should be repaired but are not usually urgent unless you have an upcoming emissions test.

What should I check first?

Start with a visual inspection of the sensor wiring and connector. Use a scan tool to read live data. For DPF codes, check soot loading level. For EVAP codes, check the gas cap first.