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P0455 code on a 2007 impala (3.5L), replaced gas cap and erased code with reader. light comes back on, what now?

Posted by Anonymous on

6 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

Molson02536
  • 3854 Answers

SOURCE: p0455 comes back on ,we try to fix it

The EVAP control sytem is checked by the ECM upon the first start of the day when the engine is cool and will trigger the DTC code P0445. If you have a vacuum line leak when it's cold and seals it self when it warms up then the code will stay there. After warming up the car reset the ECM to clear any DTC codes and see if any MILL shows up. IF not then there is a leak only when the system is cold so your going to have to try to do a smoke test when the system is cold.
The other thing is to check all the vacuum lines and fittings around the canister and fuel tank for any lose clamps ECT.
Good luck and keep me posted. Be glad to help you 

Posted on Jun 01, 2009

  • 7 Answers

SOURCE: P0455 Tighten gas cap, engine light

i had same problem purchase new gas cap only ten bucks at wal mart. If still have problem e vac leak

Posted on Jul 15, 2009

  • 7353 Answers

SOURCE: 06 chevy impala v6 3.9 liter engine. Check engine

there is a large evaporative leak. keep away form ottozoo, they dont have the brain power to actually diagnose a light bulb., their job is to sell parts., if they sell you the wrong parts tough.Take it to a qualified repair shop that does a lot of GM work or the dealer.

Posted on Sep 25, 2009

dreager
  • 119 Answers

SOURCE: engine light came on code is p0455 evap large

Here's a little more info on the situation

http://www.obd-codes.com/p0455

Posted on Mar 01, 2010

  • 121 Answers

SOURCE: I HAVE AN 2007 IMPALA LS VIN # 2G1WT55N179206343.

call your local autozone and they can tell you what you can try to fix the problem

Posted on Mar 09, 2010

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Replaced purge valve cannister & tube on 2009 chevy impala ss plus 10amp fuse, gas cap code is p0449; now the check engine light has not went out been 4 days since replace now what 2 do...help help


gas cap code p0449 ??? This is not a gas cap code ! DTC P0449: Evaporative Emission (EVAP) Vent Solenoid Control Circuit.. your best bet , take it to a qualified chevy repair shop .


Wells EVAP Training with Sgt Tech P0440 P0441 P0442 etc

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2003 mazda protege p0455 code


Look at the gas tank filler cap. Make sure the seal in the cap is good. If it is cracked it may be leaking air into the system. Simply replacing the cap usually fixes this problem

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Code p0455 gross leak/ no flow


In general terms, the code means there is a leak in the vent system for the gas tank. The most common cause is the gas cap, but it could also be a leak in the tank, a damaged hose to the vapor canister, or other problem.

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I have a 2006 Saturn Relay with just over 70k miles. The "check gas cap" came up on screen after a few days the check engine light came on. was at a friend's who has a code reader and he...


The P0455 code indicates a leak in the evaporative gas system.

A loose, improprely seated, or defective gas cap will set the code in the computer.

Insure the gas cap is on and working as it should most caps gives a ratcheting clicking sound when seated. Inspect the cap for any damage and if found replace it.

If in doubt replace the gas cap.

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Clearing code P0455 2005 Chevy Malibu from loose gas cap


all you should haft to do is unhook the battery I usually unhook it for about 30 seconds that should erase all the codes the only other way I know of is to erase them with a code reader.

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P0455, i HAVE A SMOKE MACHINE, NO LEAK. NEW GAS CAP. I reset the light and code came back


A code p0455 most likely means one or more of the following has happened:
  • A loose or improperly affixed gas cap
  • A non-conforming gas cap (i.e. not factory/original brand)
  • Other leak or damaged piece in EVAP system

Possible Solutions: with a p0455, the most common repair is to:
  • Remove and reinstall the gas cap, clear the codes, and drive for a day and see if the codes come back.
  • Otherwise, replace the gas cap, and/or
  • Inspect the EVAP system for cuts/holes in tubes/hoses (you may hear a vacuum noise or smell fuel), repair if necessary

Hope helps.

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2006 kia rio check engine light on and code P0455


A code p0455 most likely means one or more of the following has happened:
  • A loose or improperly affixed gas cap
  • A non-conforming gas cap (i.e. not factory/original brand)
  • Other leak or damaged piece in EVAP system

With a p0455, the most common repair is to:
  • Remove and reinstall the gas cap, clear the codes, and drive for a day and see if the codes come back.
  • Otherwise, replace the gas cap, and/or
  • Inspect the EVAP system for cuts/holes in tubes/hoses (you may hear a vacuum noise or smell fuel), repair if necessary

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3 Answers

2006 kia rio check engine light on and code P0455


A code p0455 most likely means one or more of the following has happened:
  • A loose or improperly affixed gas cap
  • A non-conforming gas cap (i.e. not factory/original brand)
  • Other leak or damaged piece in EVAP system

With a p0455, the most common repair is to:
  • Remove and reinstall the gas cap, clear the codes2.gif, and drive for a day and see if the codes come back.
  • Otherwise, replace the gas cap, and/or
  • Inspect the EVAP system for cuts/holes in tubes/hoses (you may hear a vacuum2.gif

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Check engine light is on, the code is p0455, which is for the emission evaporator, what could the possible problem be?


A code p0455 most likely means one or more of the following has happened:
  • A loose or improperly affixed gas cap
  • A non-conforming gas cap (i.e. not factory/original brand)
  • Other leak or damaged piece in EVAP system

With a p0455, the most common repair is to:
  • Remove and reinstall the gas cap, clear the codes, and drive for a day and see if the codes come back.
  • Otherwise, replace the gas cap, and/or
  • Inspect the EVAP system for cuts/holes in tubes/hoses (you may hear a vacuum noise or smell fuel), repair if necessary

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On a 2006 chevy impala it tells you to tighten the gas cap ,then when you do, we shut the car off. Then check engine light comes on. Where is the sensor located.


There is no sensor for a loose gas cap. What is happening is that the evaporative emission system is sensing a "Large Leak". Usually code p0455. The computer sees this as the most probable cause is a loose gas cap depending on several factors it looks at. You would need to clear the code(s) and see if that was the problem. If the light comes back on, then you have a problem in the system that will not let it seal. Possible solenoid problem, leaking hose / line, etc.

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