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2017 CHEVROLET IMPALA

2.5L I4 EcotecAWDAUTOMATICgas
Repairs0Labor990Torque7715Fluid15DTC1938Battery2Maintenance0Recalls0
P0455low severityPowertrain

EVAP System Leak Detected (Gross Leak)

on 2017 Chevrolet Impala 2.5L I4 Ecotec · AWD

What this code means

A large leak has been detected in the EVAP system.

Symptoms

  • Check Engine Light
  • Fuel smell
  • Failed emissions

Common causes

  • Gas cap missing or very loose
  • Disconnected EVAP hose
  • Cracked charcoal canister
  • Large hose crack
  • Fuel filler neck crack

Diagnostic steps

  1. Check gas cap - may be missing or damaged
  2. Visually inspect all EVAP hoses
  3. Smoke test EVAP system
  4. Check charcoal canister
  5. Inspect fuel filler neck

Repair notes

Large leaks are usually easy to find. Check gas cap first.

Other Powertrain codes on this vehicle

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