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How do I fix 2005 Mitsubishi Galant Code PO456

Check engine light came on and the code it had was PO456, Very small leak in evaporative control sytem.

Posted by Anonymous on

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

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emissionwiz
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SOURCE: check engine light code PO456

most likely the pressure sensor in the fuel tank for the evap system is defective.

Posted on Feb 26, 2009

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SOURCE: 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.

Posted on May 22, 2009

redbeard00
  • 957 Answers

SOURCE: 98 buick regal ls - po442 obd code

Usually the source of the leak is the gas cap (either loose or defective) but if that doesn't apply to your issue then the canister is next to the gas tank.

Posted on Jun 09, 2009

  • 736 Answers

SOURCE: Evap leak

your caravan has a system to control fumes from the gas tank .. any evaporating fuel is absorbed into a canister .. that is connected to a evap/purge solenoid in the engine compartment that directs the fumes to be burned in the engine once its running .. .. the problem can be as simple as a damaged or leaking or wrong type gas cap .. if the gas cap doesnt seal well then air can be drawn into the evaporitive control system ... also if any of the hoses from the evap/purge solenoid to the canister (located near the gas tank) are cracked or loose, you will get the same results .. some of these hoses are rubber .. some are hard plastic .. sometimes they come loose at the canister and need a clamp added ... the evap/purge solenoid could also be bad but much more likely the gas cap is just bad, bent or wrong ..

Posted on Aug 18, 2009

  • 115 Answers

SOURCE: obd2 reader code po442 evaporative emission

check gas cap and make sure on good, if possible find another one to try on car to see if that works clear codes before trying(take neg cable off battery for approx ten minute) or might have leak in vaccume line or canister

Posted on Sep 03, 2009

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1 Answer

Chevy suburban


Hi Jeff
Fault code P0456 means evaporator emission control small leak detected.
you need to check the tank filling cap, evaporator valve, hoses and connection for leak.
Good Luck

Apr 09, 2014 | 2003 Chevrolet Suburban 1500

1 Answer

Code po456 on my 2006 mustang 6 cyl. is there an easy fix


This elaborates more on the code.
P0456 - Evaporative Emission System Leak Detected (Very Small Leak)
Description:
The powertrain control module (PCM) monitors the complete evaporative emission (EVAP) control system for the presence of a very small fuel vapor leak. The system failure occurs when a fuel vapor leak from an opening as small as 0.508 mm (0.020 inch) is detected by the EVAP running loss monitor test.
Possible Causes:
• Very small holes or cuts in the fuel vapor hoses/tubes
• Loose fuel vapor hose/tube connections to the EVAP system components
• EVAP system component seals leaking. See the Possible Causes for DTC P0442
Diagnostic Aids:
Check for a missing fuel filler cap or the integrity of the cap.
Check for loose or damaged vapor hoses. Visually inspect the EVAP canister inlet port, CV solenoid filter, and canister vent hose assembly for contamination or debris.
Application Key On Engine Off Key On Engine Running Continuous

Nov 21, 2013 | 2006 Ford Mustang V6

1 Answer

Code po456 on a 2006 mustang 6 cylinder. any suggestions?


P0456 - Evaporative Emission System Leak Detected (Very Small Leak)
Description:
The powertrain control module (PCM) monitors the complete evaporative emission (EVAP)
control system for the presence of a very small fuel vapor leak. The system failure occurs when a fuel vapor leak from an opening as small as 0.508 mm (0.020 inch) is detected by
the EVAP running loss monitor test.
Possible Causes:
• Very small holes or cuts in the fuel vapor hoses/tubes
• Loose fuel vapor hose/tube connections to the EVAP system components
• EVAP system component seals leaking. See the Possible Causes for DTC P0442
Diagnostic Aids:
Check for a missing fuel filler cap or the integrity of the cap.
Check for loose or damaged vapor hoses. Visually inspect the EVAP canister inlet port, CV solenoid filter, and canister vent hose assembly for contamination or debris.
Application Key On Engine Off Key On Engine Running Continuous

Nov 21, 2013 | 2006 Ford Mustang V6

2 Answers

I have a Dodge Ram F1500 engine light came on code is po456 and po457 were can I find out what that is so I can fix the problem


po456 evaporative control small leak

p0457 EVAP System Leak Detected/Fuel Fill Cap Loose Or Missing

Sep 07, 2013 | Dodge Ram 1500 Cars & Trucks

1 Answer

06 mitsubishi galant service engine light comes on at half tank


the leak is in the evaporator system that purges fumes out of the tank. check for leaks in all systems that attach to tank. all it takes is a rotten rubber line with a crack in it.

Mar 28, 2013 | 2006 Mitsubishi Galant

1 Answer

What does the code po456 mean?


Usually this P0456 code is caused by an incorrect or faulty gas cap. Filling the fuel tank with the engine running could conceivable cause this code as well or if the cap wasn't properly tightened. Any of the following could also be the cause:

* A small leak in any of the EVAP hoses or fuel tank hoses
* A small leak in the purge valve or vent valve
* The EVAP Canister may be leaking

Jan 08, 2013 | 2005 Ford Focus

1 Answer

No Service Engine Soon seen for code P0442


code p 442 refers to evaporative emission (EVAP) system---small leak detected
it also refers to large leak detected --fuel cap off/loose === causes hose/connection,-- intake leak--EVAP canister---EVAP canister purge valve --mechanical fault --- EVAP pressure sensor

Oct 17, 2017 | Mitsubishi Cars & Trucks

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

The check engine light comes on my 2004 galant es and the codes states that there may be a leak in the fuel line or tank evaporation system. What to do?


Have you checked your fuel cap? A loose or leaking fuel cap will trigger an EVAP code. I would start with a new fuel cap, and have your local autozone, or checker, or automotive store clear the check engine light after you replace the fuel cap. Hope this helps

Jul 18, 2009 | 2004 Mitsubishi Galant

1 Answer

Check engine light code PO456


most likely the pressure sensor in the fuel tank for the evap system is defective.

Feb 25, 2009 | 2004 Jeep Wrangler

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