P0455

EVAP Control System Leak Detected (Gross Leak)

Q: What does fault code P0455 mean?

EVAP Control System Leak Detected (Gross Leak). The EVAP system has detected a large leak, typically equivalent to a 0.080-inch or larger orifice.

Q: What are the possible causes of P0455?

Gas cap missing or completely unsecured; EVAP piping disconnected or broken off; Canister cracked or damaged; Fuel tank pressure sensor fault; Fuel tank itself leaking.

Severity: Low Emission Control Generic Code

Detailed Description

The EVAP system has detected a large leak, typically equivalent to a 0.080-inch or larger orifice.

Possible Causes

Gas cap missing or completely unsecured

EVAP piping disconnected or broken off

Canister cracked or damaged

Fuel tank pressure sensor fault

Fuel tank itself leaking.

Solutions & Repair Guide

Check gas cap condition; Visually inspect all EVAP system piping for disconnection or breaks; Check if the canister is damaged; Use a smoke test to locate the leak point if necessary.

Disclaimer: The information above is for reference only and does not constitute professional repair advice. Actual causes may vary depending on vehicle make, model, year, and configuration. Always consult a qualified technician for accurate diagnosis.