Question about 2003 Toyota Highlander

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How to clear codes/check engine lite

I have a check engine light on and found my gas cap loose. I secured it 3 days ago and the light still remains on. If that was the problem, will I have to drive more "drive cycles" to have code/check engine light cleared, or will I have to clear the code with a scanner (or other method). Thanks, John K

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  • jkawasaki Dec 21, 2008

    Thank you for the great information. Yes, this "reset" did erase the code successfully and after securing the suspected loose fuel cap, the check engine light has remained off.

  • Anonymous Mar 28, 2014

    the drive cycle will not clear codes for inspection, check engine light and abs lights come on when driving

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Under the hood on the left side is a fuse panel, if there is a single EFI fuse, remove it for 30 seconds or so, if there is more than 1 efi fuse remove them both along with the fuse marked e.t.c.s. leave them out for 1 minute or so and that will erase the code and reset the light. make sure the key is switched off before removing fuses

Posted on Dec 20, 2008

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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.

Aug 03, 2011 | 2006 Saturn Relay

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Car runs very ruff. computer says small emissions leak.I have replaced gas cap, this helped for 1 day. now check engine lite is on again.


Did you erase the code after you repaired the problem ??..Emission leaks are usually not affective
to the engine performance...But a gas cap is for some reason...You actually need an emission
leak tester hooked to it ...Or a DRB III eng. analysis tool....I am chrysler tech.....
But normally emission troubles wont make it run rough unless it is very bad !
It may be your O2 sensor.Doublecheck gas cap security.....make sure old code is cleared before you make any more adjustments....Check engine for any vacum leaks...This could be the problem....Because it shouldnt run good for a day after changing only the gas cap...
Make sure all electrical connections ( PLUGS/WIRES/INJ.CONNECTIONS...etc..) are good...
You may have to take to dealer to clear codes and recheck.....Maybe update PCM
Hope this helps.......................................Level II CHRYSLER ..................Metalpoet

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P1456


code P1456 set when there's small leak in the fuel tank system.
Most known reason for P1456:
-Didn't tight fuel cap on until it click for more that 3 time after fueling up and drove the car too long with cap loose.
-or a bad gas cap.
I'll try tighting the gas cap.
clear check engine.
if code come back, replace gas cap and clear check engine light again.

Dec 15, 2010 | 2001 Honda Odyssey

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How to reset engine check light for loose gas filler cap


Just disconnect the NEG battery terminal for 10 minutes and the Code should clear. Or you can get a free scan at Autozone or Oreillys and they will use their scanner to clear your computer.

The advantage with the scanner is you will not lose radio station Presets or security codes.

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@004 Pilot the check engine light came on after my daughter bought gas. Autozone code was p1456. Car seems to be running fine.


2004 Honda Pilot engine light came on this morning. Last bought gas 5 days ago. Auto Zone checked and found code P1456, emission control system leak detected (fuel tank system)
Four options;
1) Loose fuel cap
2) Vapor canister saturated
3) Failed vent solanoid
4) Failed purge solenoid

Thanks.

Aug 14, 2010 | Honda Pilot Cars & Trucks

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Check engine light came on, ran codes and got miss fire on #6 hole. changed plugs and cleared code, light came on again. ran codes and came up with P0440 evap. checked lines and found no defect. cleared...


Would guess that canister would be dealer only but never hurts to check the local parts store.Could also check online parts store.They say this problem comes from topping of your tank.When fueling and the pump shuts off you are not to put any more in.Just a thought.

Feb 02, 2010 | Buick Regal Cars & Trucks

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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 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 came on this morning, mazda 3 09', it has 14,500 miles, i just got an oil change at the dealership a few days ago, also i think the gas cap was a little bit loose i noticed the last time...


I would take it back to the dealer and tell them the check engine light came on not long after oil change. Have them run the code on their dime...it's a reasonable request!

A loose gas cap will defintely trigger the engine light, but in most cases, it will reset itself within one week. Some cars don't have a reset which forces you to have a mechanic reset it for you.

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1 Answer

2004 Audi allroad V8 Check Engine Light ON: 65,000 miles.


It can be your CO2 sensor. And another one that all ways makes the check engine light come on is your gas cap be for you turn your car on make sure your gas cap is on like 3 clicks then go clear the codes. If that doesn't help then good luck

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2003 Highlander (AWD V6)


The gas cap turned the light on ( I assume you knew that), go to kragen auto and ask them to run a OBD 2 code test, when they get the code ask if they will clear it for you with the scan tool, this is free, other parts stores do this as well for free. If you want to wait the light will clear after a complete drive cycle, this can take up to week depending on what kind of useage the car gets.

Oct 13, 2008 | 2001 Toyota Corolla

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