Question about 2004 Chevrolet Monte Carlo

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Check engine lite

ObdII code PO455

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  • Anonymous Jul 01, 2008

    a leak in evap system

  • Anonymous Feb 25, 2009

    vac code po 455

  • ss camaro Apr 18, 2009

    vac code po445 a leak in evap system. changed fuel cap,checked for vacume leaks can not find any. told could be a vacume leak in system. any body else have this problem or no how to solve this.help tom.

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I have a leak in my evap system

Posted on Jul 01, 2008

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What is code po455 and how do I fix it?


Evaporativ emmision on fuel tank. If u cant pump gas into tank then hav a prolook at it. Othrwise its not urgent xcept fir engine lite. Its commonly a bad vent solenoid that builds pressure

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Code 4 and engine lite on


If the check engine light is on there will be OBDII and manufacturer specific codes. These codes start with a letter and are followed by four numbers (P0304 for example). These codes can only be read by an OBDII code reader or a scan tool. These are the codes you need to get in order to start trouble shooting your vehicles problem.

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1 Answer

95 cirrus lx 12,71,33,23 update. Engine runs great but engine lite won't go out for smog


how are you reading these codes? if you have an OBDII code reader then you should get a 4 digit code. you can go here to learn what they mean
http://engine-codes.com/search_codes.php?q=33

Dec 13, 2014 | 1995 Chrysler Cirrus

1 Answer

Need help trouble shooting 2 codes, P0401 & P0455


Google the codes

Lots to read & study

OBD2 PO401

OBD2 PO455

Think you will a repair shop to smoke the
Evap for the 455

Feb 14, 2013 | 2000 Mercury Mountaineer

1 Answer

Check engine light came on and the code showed po455


its a evap code could be from a bad gas cap to a cracked vapor line or a bad sensor

Oct 01, 2012 | Cars & Trucks

1 Answer

2005 chevy Z71 check engine code PO449 and PO455 5.3 Lt engine how do i fix them


get a new gas cap your evap sytem isnt working if the gas cap doesnt work then you might have a leak and check your EVAP purge valaves

Dec 07, 2011 | Cars & Trucks

1 Answer

Service engine lite on Can it be from low octane gas


It can also be called the " Check engine light ".
In order to turn off the "Check Engine Light", you or a trusted mechanic check the Onboard Diagnostics (OBDII) OBDII uses a "code reader" which plugs into your car (usually in the dashboard, or near the radio...) and that tells you what "malfunction" is setting your Check Engine Light off.
Basically, if there is a fault in any computer controlled system (fuel, ignition, SRS (airbag), emissions etc) the Electronic Control Unit (ECU) sends a code to the OBD unit... Then the code reader breaks down the fault, it's location and usually (with a good reference manual) you can remedy the problem (or at least narrow it down!)

Thank you Sir, Have a nice day.

Sep 20, 2009 | 2001 Volkswagen Beetle

1 Answer

Check engine light comes on


"po455 large leak" means that you are not maintaining positive pressure in your fuel system. Have a mechanic do a "smoke test" on the fuel system. Could be as simple as a loose gas cap...

Jun 01, 2009 | 2001 Dodge Durango

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