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P0455 - Evaporative Emission Control System Leak Detected Gross Leak

Possible causes
- 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
- EVAP canister or fuel tank leaks
- EVAP system hose leaking
- Fuel tank leaking
Tech notes
The P0455 it’s a very common code, because the code is set if the gas cap is loose or missing. Start by tighten the gas cap and clearing the code. In most cases the code can be clear by disconnecting the car battery for about 30 minutes.
When is the code detected?
Evaporative Emission System (EVAP) control system has a very large leak such as fuel filler cap fell off, EVAP control system does not operate properly.
Possible symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
- Possible a noticeable fuel odor caused by the release of fuel vapors
P0455 Description

This diagnosis detects leaks in the Evaporative Emission System (EVAP) purge line using engine intake manifold vacuum. If pressure does not increase, the Engine Control Module (ECM) will check for leaks in the line between the fuel tank and EVAP canister purge volume control solenoid valve under the following vacuum test condition.

The vacuum cut valve bypass valve is opened to clear the line between the fuel tank and the EVAP canister purge volume control solenoid valve. The EVAP canister vent control valve will then be closed to shut the EVAP purge line off. The EVAP canister purge volume control solenoid valve is opened to depressurize the EVAP purge line using intake manifold vacuum. After this depressurization is implemented, the EVAP canister purge volume control solenoid valve will be closed.

OBDII Code P0455 - Evaporative Emission Control System Leak Detected Gross Leak - AutoCodes.com
P0455 Information for specific makes
P0455 ACURA EVAP System Large Leak Detected  P0455 Image
P0455 AUDI EVAP System Large Leak Detected  P0455 Image
P0455 BUICK Evaporative Emission Control System Leak Detected Gross Leak
P0455 CADILLAC Evaporative Emission Control System Leak Detected Gross Leak
P0455 CHEVROLET Evaporative Emission Control System Leak Detected Gross Leak
P0455 CHRYSLER EVAP System Large Leak  P0455 Video
P0455 DODGE EVAP System Large Leak  P0455 Video
P0455 FORD Evaporative Emission Control System Leak Detected Gross Leak  P0455 Image
P0455 GMC Evaporative Emission Control System Leak Detected Gross Leak
P0455 HONDA EVAP System Large Leak Detected  P0455 Image
P0455 HYUNDAI EVAP Emission System Leak Detected Large Leak  P0455 Image
P0455 INFINITI EVAP Control System Gross Leak Detected  P0455 Image
P0455 ISUZU Evaporative Emissions System Large Leak  P0455 Image
P0455 JEEP EVAP System Large Leak
P0455 KIA EVAP Emission System Leak Detected Large Leak  P0455 Image
P0455 LEXUS EVAP System Gross Leak Detected  P0455 Image
P0455 MAZDA EVAP Emission System Leak Detected Large Leak  P0455 Image
P0455 MERCEDES-BENZ Evaporative Emission Control System Leak Detected Gross Leak
P0455 MITSUBISHI EVAP System Large Leak Detected  P0455 Image
P0455 NISSAN EVAP Control System Gross Leak Detected  P0455 Image
P0455 PONTIAC Evaporative Emission Control System Leak Detected Gross Leak
P0455 SATURN Evaporative Emission Control System Leak Detected Gross Leak
P0455 SCION EVAP System Gross Leak Detected  P0455 Image
P0455 TOYOTA EVAP System Gross Leak Detected  P0455 Image
P0455 VOLKSWAGEN EVAP System Large Leak Detected  P0455 Image
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