P0455 Evaporative Emission Control System Leak Detected (Large Leak)

Powertrain Severity: Low Generic OBD-II

A large leak or no flow was found in the EVAP system.

Common causes

  • Missing or loose fuel cap
  • Disconnected EVAP hose
  • Faulty vent or purge valve

Symptoms

  • Check engine light
  • Fuel smell

What to check

  1. Check the fuel cap first
  2. Inspect hoses for disconnection
  3. Smoke-test the system

Manufacturers may add their own detail to generic codes. If your vehicle shows a different description for P0455, follow the service information for that make and model.

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