2009 Scion P0455: What It Means & Is It Safe to Drive?

P0455 on the 2009 Scion: Evaporative Emission System Leak Detected (Large Leak). Here's what it means, what usually causes it, what repairs typically cost, and whether it's safe to keep driving.

PowertrainMedium urgency

What this code means

A large leak has been detected in the EVAP system. Could be gas cap left off, disconnected hose, or damaged canister.

Common causes on the 2009 Scion

  • Gas cap missing or not sealed
  • Disconnected or ruptured EVAP hose
  • Damaged charcoal canister
  • Faulty purge/vent solenoid

Symptoms

  • Check Engine Light
  • Fuel smell possible

Typical fixes

  • Install or replace gas cap
  • Inspect and repair EVAP hoses
  • Replace canister or valves as needed

Repair cost range

For a 2009 Scion, repairs for P0455 typically fall between $20 and $500, depending on the root cause and labor rates in your area.

Is it safe to keep driving your 2009 Scion with this code?

For driving-safety guidance—how far you can go, when to tow, and what's urgent—see these checklists:

See all codes for your Scion

Looking for a different code, or want the full guide without the year filter?