Question about 2001 Pontiac Grand Am SE

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Check engine light on, recovery system. I replaced gas cap, had fuel lines checks for leaks,what eles can I do?

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Check vapor canister for flow or leaks check for vacum leaks check pcv val check all the vacum hoses for leaks check purge sel-ond etc etc what was the code too low flow or no flow or what??

Posted on May 09, 2010

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I would like to know what the code PO455 on a 2007 Mitsubishi Endeavor means.


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
help.jpg What does this mean? 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.
help.jpg What does this mean? 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 Mitsubishi 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.

Read more: http://engine-codes.com/p0455_mitsubishi.html#ixzz3NlVyARyX

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Dec 30, 2014 | Cars & Trucks

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Computer code 455


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 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. Possible symptoms - Engine Light ON (or Service Engine Soon Warning Light)
- Possible a noticeable fuel odor caused by the release of fuel vapors P0455 Buick 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.
if tightening the cap or replacing the cap does not help take your car to a shop to have it diagnosed as it requires special tools/equipment to test this and get an accurate results to find what needs replacing.

Oct 10, 2014 | 2004 Buick LeSabre

2 Answers

Obd code p0457 fuel cap replaced mil reset defect not cleared connection checked ok


The code is for a large leak in the EVAP system such as a loose or missing gas cap. But it could also mean a loose or missing hose to the canister or other leak in the tank.
The computer vents the tank several times an hour while the engine is running, and it checks the system by pressurizing the gas tank. If the tank will not hold pressure the code is set.
You may have to check the top of the tank where the fuel pump gasket is, as well as the vent lines to the front of the car.
A mechanic would perform a smoke test to look for leaks.

Jul 23, 2012 | Honda Accord Cars & Trucks

2 Answers

Po440 comes up as evap emmissiion malfuntion what sensor is that?


Most likely the gas cap is loose but, ....unless there is a hole in one of the evap lines or the fuel fill pipe, the most logical problems are the cap, the vent solenoid, and lastly the purge solenoid....

Take the cap off and re install it making sure it is tight and it clicks at least 3 times, drive tha car a while and after a certain number of starts and re starts of the engine the code should clear, if not then start checking the vacuum lines to the vapr recovery system as well at the gas fill hose and like I stated the last items will be those selenoids.

Aug 25, 2011 | 2003 Chevrolet Impala

3 Answers

P0456 error code on a 2003 Mits. Galant


P0456 = "Evaporative emission (EVAP) control system leak detected (very small leak)."

Feb 25, 2011 | Mitsubishi Galant Cars & Trucks

1 Answer

Check engine light is on, hooked up computer to brain and it says it was a fuel leak sensor or fuel leak evape sensor. where is this sensor located, it also only shows fuel gauge reading of 3/4 tank full...


check ur gas cap first for proper seal and or not tightened this is the usual problem the evap system is from your fuel gas cap [gas--vent lines /gas tank-evap canister-throttle body] to ur throttle body/injectors if gas cap good need to check the lines and components for a leak disconnected /cracked broken-as well as the sensors and canister

Feb 21, 2010 | 1992 Ford Ranger

1 Answer

My 2002 Cadillac Service Engine Light came on, code scanned for Catalytic converter. I replaced the converter after 2 weeks light came back on as well as alerts foe check gas cap, and check coolant level....


the code for gas cap? is also a code for small leak in evap system which includes the fuel /vent lines and canister check that the lines weren't damaged when cat was put in also check coolant sensor in reservoir connections runs by exhaust system

Nov 01, 2009 | 2002 Cadillac Deville

3 Answers

Leak in evap system, where and what is an evap system. 2001 mitsubishi Galant


I have the same failure that occurred when smogging my Ford Ranger. The EVAP test was just added a couple of years ago and it tests for leaks in the gas tank vapor recovery system. What this is a system of vapor recovery lines that connect from the gas tank and goes to a canister then returns to the intake and on the next engine start and gets used, instead of leaking into the air.

The only issue is these lines can develop a leak at any of the connection points or along the rubber portions and can be a pain to replace depending on your application. So until you fix the leak you will fail this test since they pressurize the system and if there is a leak it won't hold the pressure.

May 05, 2009 | Mitsubishi Galant Cars & Trucks

1 Answer

Check engine light/ dash message "tighten gas cap"


I can't tell you where yours is but I can tell you how to find it. It's a plastic (sometimes metal) cylinder about the size of a normal coffee can. it has a flat vacuum fitting on the top with usually three or four hoses going to it. Normally it is located low against one of the fenders and can usually be seen easier than you can reach it with your hand. on the bottom you will see a cloth filter. If you can find something like that, you have found it.
I would also check the lines and hoses going to the fuel tank. Any leak in the vapor recovery system will show up as a cap leak which is only a part of the system. (just did one on a Pontiac GA with a similar problem)

Mar 22, 2009 | 2004 Chevrolet Avalanche

1 Answer

2001 Dodge Caravan/check engine light


Is your gas cap tight? check it, these codes indicate a large leak in the fuel evaporative emission recovery system at the gas tank

Jun 24, 2008 | 2007 Chrysler Town & Country LX New Cars

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