P0440

Evaporative Emission System Malfunction

Severity: Low Emission Control Generic OBD-II Code Est. Repair: $50 - $400

Usually safe to drive short-term, but diagnose soon.

What Does P0440 Mean?

General EVAP system fault.

Common Symptoms

CEL
Possible fuel odor

Possible Causes

Purge/vent valve
Wiring
Canister
Leak

How to Fix P0440 – Repair Guide

Scan for more specific EVAP codes
Smoke test
Test solenoids
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Recommended OBD2 Scanners & Tools

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FIXD Bluetooth OBD2 Scanner

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Disclaimer: Information is for educational reference only and does not replace professional diagnosis. Actual causes and costs vary by vehicle make, model, year and condition. Always verify with a qualified technician.