P0455 Pontiac - Evaporative Emission Control System Leak Detected Gross Leak
Repair Importance Level:
Repair Difficulty Level:
- 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
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?
EVAP control system has a very large leak such as fuel filler cap fell off, EVAP control system does not operate properly.
- Engine Light ON (or Service Engine Soon Warning Light)
- Possible a noticeable fuel odor caused by the release of fuel vapors
P0455 Pontiac 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.
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PONTIAC Technical Service Bulletins for P0455 code
2009 PONTIAC G5 Engine And Engine Cooling:engine Details
2009 PONTIAC G5 Fuel System, Other:storage:tank Assembly:pressure Relief Devices Details
2009 PONTIAC G5 Electrical System Details
2010 PONTIAC G5 Engine And Engine Cooling:engine Details
2010 PONTIAC G5 Fuel System, Other:storage:tank Assembly:pressure Relief Devices Details
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