Question about 2005 Chevrolet Equinox

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How to reset engine check light for loose gas filler cap

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  • Chevrolet Master
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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.

Posted on Sep 13, 2010

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  • Contributor
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Screw on the gas cap, then reset it using an OBD2 scanner with a rest function. If no scanner is available, it eventually will reset itself, but may take several days and several miles. Most new cars store it in memory and unhooking the battery won't reset any code.

Posted on Sep 01, 2013

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  • Master
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It will reset itself after a few days

Posted on Sep 13, 2010

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Posted on Jan 02, 2017

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SOURCE: check engine light came on after a loose gas cap.

by dissconecting the battery but be careful some vehicle when you do that need a code to get the radio going again . My recommendation is to take it to autozone they normally do it for free.

Posted on Dec 21, 2009

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1 Answer

How can I reset the 1684 code on my 2001 neon?


A loose gas cap will throw a P0456 trouble code so will the gas filler neck.You can take the ground cable off of the battery for 3 minutes to reset the computer but,if that does'nt work you will need a scan tool or a code reader.

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Obd code p0457 fuel cap replaced mil reset defect not cleared connection checked ok


The code is for a large leak in the EVAP system such as a loose or missing gas cap. But it could also mean a loose or missing hose to the canister or other leak in the tank.
The computer vents the tank several times an hour while the engine is running, and it checks the system by pressurizing the gas tank. If the tank will not hold pressure the code is set.
You may have to check the top of the tank where the fuel pump gasket is, as well as the vent lines to the front of the car.
A mechanic would perform a smoke test to look for leaks.

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P0496 is not alisted code.
P0455 - Evaporative Emission Control System Leak Detected Gross Leak (fuel vapors)
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I have a 2000 dodge dakota quad cab (4.7L / V*). My check engine light kept coming on after tightening the loose gas cap. I purchases a new gas cap specifically for my truck and the light came on again...


Check that there are no other leaks in the gas filler neck or gas tank itself that would cause the gas cap error to cause the check engine light to go on.

A lack of pressure in the tank can cause the check engine light to go on, erroneously signalling that the gas cap is loose or missing.

Good luck on this repair.

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Check engine light comes on have had it in twice for a fix/they say its the gas cap well the first time they cleaned the old cap and re set the computer.the second time they replace the cap and re set the...


Well, I would check the filler neck connections and the condition of the filler neck. If this is leaking there, or the tank is leaking, the loose gas cap code will show up.

Keep taking it back to the original shop until the problem is fixed. Have faith.

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Engine code 0456 ( evaportive emission control system leak detected, very small leak ) installed a new OEM gas cap and reset the computer. Worked fine for 1 1/2 week and check engine code came back? Cleand...


It's a leak in your evap system. Causes: *Loose or missing fuel cap. *Evap canister broke, hose cracked or not connected. *Purge or vent solenoid defective *Vacuum leak at engine good luck

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F-150 ford truck check engine light keeps coming on


Did you replace the gas cap? Also check the filler tube that's where the gas cap snaps on where you put gas in. The filler tube or neck has a thin lining of plastic at the top look for small cracks in it where the gas cap goes on. It there's cracks in it, it will cause an emission leak and sometimes a dealer won't find it until you spent a lot of money on diagnostics. And it depends if there best mechanic was working on it.

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Engine light came on said purge flow senser or evap canister


Your evaporitive emission system has failed. The code indicates a fuel vapor leak in the purge system.
This can be caused by a loose gas cap to a damaged vacuum hose or regulating component.
Check the gas cap first, make certain the cap is tight and the seal on the cap is in good condition, no tears or damage. Check the fuel filler pipe for knicks and dents.
If the cap was loose, the light will not clear until the next cold start, that is when the engine computer runs the test.
Good luck, let me know.
Regards,

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Check engine light comes on if gas cap is loose (according to the dealer) - not really wanting to go back to the dealer repeatedly for a quick fix to turn off the light, but not wanting to ignore the check...


replace the gas cap .. clean the gas filler pipe where it seals against the gas cap .. .. even a small crack in the rubber seal will trigger the check engine light ..

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