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CODE PO455

CHECK ENGIN LIGHT CAME ON,DID DIAGNOSTICS CODE PO 455 CAME UP.

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Evap leak....... small could by a gas cap or the evap pump

Posted on Nov 10, 2008

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How do I clear the code PO455 after the repair?


You would need a scanner or code reader to erase the code.
Keep in mind code 455 is for a large leak so it could be something other than the gas cap.

Oct 09, 2015 | 2006 Hummer H2

1 Answer

Code po455


Code 455 means there is a large leak in the evap system. The evap system is how the computer vents the gas tank to the vapor canister. The system would need to be pressure tested.

Jul 16, 2014 | 2009 Nissan Versa

1 Answer

Check engine with error codes P1111 and P0455


The Code 455 is showing the large leak in the Evaporative system (gascap) and the Code 1111 shows there are no defects.

You can get these codes wiped off with a scanner free at Autozone, Oreilys, or Advance. They may clear by themselves after 35 startups.

It would just appear to be a latent record of the old condition before and after you tightened the gascap.

Aug 29, 2012 | 2003 Jaguar Xkr

1 Answer

Code po455 reading on scan...mech. checked all hoses from engine to rear of vehicle all fine...i hate to spend $$$ on someone trying to find...gave my car complete tune up and light still on...HELP


PO 455 -- Evap System Gross Leak

That wasn't a mechanic you went to

All hoses or Evap Solenoids are not fine
& a tune -up is no more than spark plugs

That has nothing to do with diagnosing an evap issue

Need a professional scan tool & evap smoke machine
& a knowledgeable person to do the work

Aug 19, 2011 | 2005 Pontiac Sunfire

1 Answer

My light came on had some one check the codesand it came up PO 455 AND ALSO PO455 what could this be from


P0455 is Evaporative Emission System Purge Conlrol Valve Circuit Shorted. In otherwords the wires going to the Purge Control Valve may be fried.Or mabe the valve needs to be replaced.Good Luck and have a dood XMASS.

Dec 16, 2010 | Chevrolet Malibu Cars & Trucks

1 Answer

Code po 455 and code po 307


P0455: EVAP- no purge flow or large leak. Check for leaks in the evaporative purge system.
P0307: #7 cylinder misfire. Check spark plug and wire.

Aug 23, 2010 | 2000 Ford Explorer

2 Answers

2000 Dodge Intrepid with PO455 code and stalling.


A code 455 most likely one or more of the following has happened
a loose or bad gas cap
a non-conforming gas cap
other leaks or damage pieces in the evap system

Inspect the evap system for cracks or breaks in lines listen for vacume leaks or strong gas fume smell and fix all lines you find that are damaged ..I know you say you put a new gas cap but make sure it a conforming cap..Hope this helps

Nov 14, 2009 | 2000 Dodge Intrepid

2 Answers

My engine light came on


Trouble Code: P0455


EVAP Large Leak Detected

Possible Causes:


EVAP purge solenoid is damaged or it has failed

Fuel tank cap is damaged, missing or the wrong part number.(Check the fuel cap). replace if not the factory type.

NVLD switch is damaged or it has failed

Jul 14, 2009 | 2000 Nissan Xterra

1 Answer

I have a 2001 nissan sentra xe and my check engine light is on i had a diagnostic test and the codes PO 455 and PO 0440 came back what does this mean?


PO 455- Evaporative emission control System leak detected (check exhaust system, egr valve, or entire intake and exhaust system)


PO440- Evaporative Emission System Malfunction (also check oxygen sensor)

Jul 13, 2009 | 2001 Nissan Sentra

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