TorqueMech Beta
TorqueMech OBD Code Guide

P0440 - Evaporative Emission Control System Malfunction

General EVAP system fault detected.

Code Meaning

General EVAP system fault detected.

Common Causes

Loose/damaged gas cap
EVAP hose leak
Purge/vent valve issue
Charcoal canister issue

Quick Checks

  • Tighten/inspect gas cap
  • Inspect EVAP hoses for cracks
  • Smoke test EVAP system if available
  • Check purge/vent valve operation

Likely Repairs

Use test results to confirm the fault before pricing the repair.

Open Estimator

Next Steps

Move from the code to a diagnosis path, then into repair pricing once the fault is confirmed.