P0455 Code: Evaporative Emission Control System Leak Detected (Gross Leak)
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Code P0455 indicates the PCM has detected a large leak in the EVAP system. A gross leak is typically much easier to find than a small leak.
Diagnostic system: EVAP leak and purge system
On a Ford Focus, the P0455 code should be diagnosed as part of the evap leak and purge system group. Related codes and live data from this same system can change the repair priority, so avoid replacing parts from the code name alone.
Most Common Causes for Ford Focus
- Gevşek, hasarlı veya kayıp yakıt deposu kapağı
- Çatlak veya kopuk EVAP hortumu
- Arızalı EVAP arındırma kontrol valfi
- Arızalı EVAP havalandırma valfi/solenoidi
- Doymuş veya hasarlı EVAP karbon filtresi
Dikkat Edilmesi Gereken Belirtiler
- Motor Arıza Lambası yanar
- Araçtan güçlü yakıt kokusu
- Egzoz emisyon testinden kalma
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- Confirm the fuel cap seals correctly and is the right type for the vehicle.
- Inspect EVAP hoses, purge valve, vent valve, and charcoal canister connections.
- Use a smoke test before replacing multiple EVAP parts.
- Check for blown fuses, weak battery voltage, and damaged connectors before buying major parts.
Nasıl Teşhis Edilir
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Replacing the gas cap repeatedly without smoke-testing the EVAP system or checking purge and vent valve operation. Always confirm the fault with freeze-frame data, live data, visual inspection, and circuit checks before spending money on parts.
CodePage.faq
Can I drive with the P0455 code?
If the check engine light is solid, you can usually drive to a safe location or mechanic. If the light is flashing, pull over immediately to prevent catastrophic engine or catalytic converter damage.
Will the P0455 code clear itself?
Once the underlying problem is fixed, the engine computer will run its self-checks. If it passes over several drive cycles, the light will turn off automatically. You can also clear it immediately using an OBD2 scanner.
Will this code fail an emissions test?
Yes. If the Check Engine Light is on due to the P0455 code, your Ford will automatically fail an OBD2 plug-in emissions or smog test.
What should I check first for P0455?
Confirm the fuel cap seals correctly and is the right type for the vehicle. Inspect EVAP hoses, purge valve, vent valve, and charcoal canister connections. Use a smoke test before replacing multiple EVAP parts.
Join the Discussion
Tahmini Tamir Maliyeti
Fuel cap, hose clamp, or small EVAP hose repair
Major component replacement after live data and circuit tests confirm failure
Parça ve işçilik dahildir. Konuma göre değişebilir.
Many EVAP fixes are low to moderate cost, but smoke testing saves money by locating the exact leak.
Tamir Zorluğu
Can usually be performed at home with basic hand tools.