P0455 Code - Evaporative Emission Control System Leak Detected Gross Leak
Quick Answer
The Engine Control Module (ECM) tests the Evaporative Emission (EVAP) system for a large leak or restrictions to the purge path in the EVAP system. Common causes include Missing or loose fuel cap, Incorrect fuel filler cap used, Fuel filler cap remains open or fails to close. Severity is Low - monitor the vehicle and repair when practical. The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.
- What it means
- P0455 indicates Evaporative Emission Control System Leak Detected Gross Leak.
- Common causes
- Common causes include Missing or loose fuel cap, Incorrect fuel filler cap used, Fuel filler cap remains open or fails to close.
- Severity
- Low - monitor the vehicle and repair when practical.
- Can I drive?
- The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.
Code P0455 Description
What are the Possible Causes of the DTC P0455?
- Missing or loose fuel cap
- Incorrect fuel filler cap used
- Fuel filler cap remains open or fails to close
- Foreign matter caught in fuel filler cap
- Leaking EVAP Canister
- Leaking EVAP System Hose
- Leaking Fuel Tank
- Faulty Fuel Tank Pressure Sensor
How to Fix the DTC P0455?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
Code Tech Notes
User Submitted Video
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P0455 code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
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Information for Specific Makes
- P0455 Acura — EVAP System Large Leak Detected
- P0455 Audi — EVAP System Large Leak Detected
- P0455 BMW — Evaporative Emission Control System Leak Detected Gross Leak
- P0455 Buick — Evaporative Emission System Large Leak Detected
- P0455 Cadillac — Evaporative Emission System Large Leak Detected
- P0455 Chevrolet — Evaporative Emission System Large Leak Detected
- P0455 Chrysler — EVAP System Large Leak
- P0455 Dodge — EVAP System Large Leak
- P0455 Ford — Evaporative Emission Control System Leak Detected Gross Leak
- P0455 GMC — Evaporative Emission System Large Leak Detected
- P0455 Honda — EVAP System Large Leak Detected
- P0455 Hyundai — EVAP Emission System Leak Detected Large Leak
- P0455 Infiniti — EVAP Control System Gross Leak Detected
- P0455 Isuzu — Evaporative Emissions System Large Leak
- P0455 Jaguar — Evaporative Emission Control System Leak Detected Gross Leak
- P0455 Jeep — EVAP System Large Leak
- P0455 KIA — EVAP Emission System Leak Detected Large Leak
- P0455 Lexus — Evaporative Emission Control System Gross Leak Detected
- P0455 Lincoln — Evaporative Emission Control System Leak Detected Gross Leak
- P0455 Mazda — EVAP Emission System Leak Detected Large Leak
- P0455 Mercedes-Benz — Evaporative Emission Control System Leak Detected Gross Leak
- P0455 Mercury — Evaporative Emission Control System Leak Detected Gross Leak
- P0455 MINI — Evaporative Emission Control System Leak Detected Gross Leak
- P0455 Mitsubishi — EVAP System Large Leak Detected
- P0455 Nissan — EVAP Control System Gross Leak Detected
- P0455 Pontiac — Evaporative Emission System Large Leak Detected
- P0455 Saturn — Evaporative Emission System Large Leak Detected
- P0455 Scion — Evaporative Emission Control System Gross Leak Detected
- P0455 Toyota — Evaporative Emission Control System Gross Leak Detected
- P0455 Volkswagen — EVAP System Large Leak Detected
Frequently Asked Questions about P0455 Code
1. What are the common symptoms of OBDII code P0455?
The common symptoms of code P0455 include the check engine light illuminating on the dashboard, a strong smell of fuel near the vehicle, and potential difficulties with passing emissions tests.
2. What could cause the OBDII code P0455 to trigger?
The most common cause of code P0455 is a gross leak in the evaporative emission control system. This could be due to a loose or damaged gas cap, cracked or disconnected hoses, a faulty purge valve, or a damaged charcoal canister.
3. How serious is OBDII code P0455?
While code P0455 is not an immediate threat to vehicle safety, it should not be ignored. A significant leak in the evaporative emission control system can lead to increased emissions, decreased fuel efficiency, and potential long-term engine damage.
4. Can I continue driving with OBDII code P0455 present?
In most cases, it is safe to continue driving with code P0455, but it is recommended to address the issue promptly to prevent further damage to the vehicle and ensure compliance with emissions regulations.
5. How do I diagnose and repair OBDII code P0455?
To diagnose code P0455, a mechanic will typically perform a visual inspection of the evaporative emission control system components, conduct a smoke test to identify leaks, and use a scan tool to monitor system pressure. Repairing the issue may involve tightening or replacing the gas cap, repairing or replacing damaged hoses, or replacing faulty components like the purge valve or charcoal canister.
6. Can a bad gas cap cause code P0455?
Yes, a loose, damaged, or missing gas cap is a common cause of code P0455. Ensuring the gas cap is properly tightened or replacing it with a new one may resolve the issue.
7. How much does it cost to fix OBDII code P0455?
The cost to fix code P0455 can vary depending on the underlying cause of the issue and the specific repairs needed. In general, repairs for this code can range from $100 to $500 or more, depending on the extent of the problem and the parts and labor required.
8. Will resetting the check engine light make OBDII code P0455 go away?
Resetting the check engine light may temporarily turn off the light, but it will not fix the underlying issue causing code P0455. The problem must be diagnosed and repaired to prevent the code from reappearing.
9. How long does it take to repair OBDII code P0455?
The time it takes to repair code P0455 can vary depending on the specific cause of the issue, the availability of parts, and the mechanic's experience. In general, repairs for this code can be completed within a few hours to a full day.
10. Can I prevent OBDII code P0455 from occurring?
Regularly inspecting the gas cap for proper sealing, checking the integrity of hoses in the evaporative emission control system, and performing routine maintenance can help prevent code P0455 from occurring.
Discuss the causes and fixes for P0455 OBDII Code
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found evap leak at rubber hose connection to air cleaner not secured under the clamp,
i put hose back under clamp an tightned an light whent out.
It was the last option!
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