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It told me my issue was the gas cap & I replaced it over a week ago. I plugged in & I know I have driven far enough for it to register the change, but I'm still seeing the check engine light on.

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Evap small leak can be gas cap but thats not the only reason if cap wasnt culprit their are a bunch of other areas that can cause leak

Posted on Aug 13, 2017

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  • Cars & Trucks Master
  • 1,045 Answers

You need to reset the light with a scanner .

Posted on Aug 13, 2017

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Posted on Jan 02, 2017

  • 1 Answer

SOURCE: 2003 VW Jetta TDI Check Engine Light Issue

Try disconnecting the battery (unhook on of the terminals) wait for like 15 mins, hook the terminal once again and start the car. I also own a 2003 Jetta and once my engine light would come on after 2 mins of driving. Disconnecting the battery is like resetting the computer and hopefully the sensor.

Posted on Jun 13, 2009

  • 1 Answer

SOURCE: gas gauge not woking properly gas tank only accepts a little gas

I had the same problem. My gas gage would read full and as I drove the gage would read empty; even when I had a full tank of gas. All I had to do is buy a new gas cap... yes that is all! $15.00 and a day later the gas gage is fixed.

Posted on Jun 23, 2009

  • 7353 Answers

SOURCE: 2006 Saturn Relay Check Engine Light

PO455 is a large evaporative fuel leak. A bad fuel cap is ONE of the things that COULD be the problem. Fuel system cleaning only lightened your wallet. Reading your post is confusing. Did all this start AFTER the Valvoline Wallet Flushing? If so , they left something loose or disconnected. I would find a qualified repair shop to fix the problem, and if it has anything to do with what Valvoline did, make them pay the bill.

Posted on Nov 12, 2009

Onifade
  • 268 Answers

SOURCE: Three problems so far. Check engine light stays

You might try removing the battery connectors for five minutes and replacing back.

If the codes do not disappear, please you might have to get a scanner to do that.

Cheers.

Posted on Dec 15, 2009

johnjohn2
  • 5763 Answers

SOURCE: I have a 2005 GMC CANYON and the check engine has

Theres is a way, you can do it with a scan tool or remove a battery connection for 5min, the check engine light can come on for many reasons, when the computer sees a problem with the engine sensors or trany that is out of specs it will turn on the light and store a codes in the computer, this codes will tell you what part of what system is failing, i would have the codes read to see what the problem is, this way you dont do any further damage, many autopart stores will scan the codes for free, i think you should get the code or codes and i will help you further, good luck and i hope this helps.

Posted on Dec 10, 2010

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1 Answer

2006 Cadillac cts is burning gas faster than the normal rate after i got an oil change at jiffy lube 2 weeks ago


I dont think there is a connection between an oil change and the gallons per mile.
With that age car, I suggest a Terra engine clean. It will blow away nine years of gunk from the spark plugs, fuel injectors, cylinders and exhaust. Should give you more power, more miles..

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$500.00 is a pretty steep price for an oil change!

If this is a gas cap issue, be aware that simply removing and replacing the cap will not immediately fix it. Most of the loose cap errors will only reset after the vehicle is driven for a period of time, not right as soon as you replace the cap. Speaking of replacing the cap, if the original has a bad seal, you aren't fixing anything doing what you've done.

Get a new gas cap first, then give it a while driving to see if it clears the error.

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Usually the ck eng light comes on for Emmissions related problems such as sensors and possible engine missfire (runs rough) If the car runs ck the GAS CAP for proper closure it should click

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Look for vacuum leaks. There are tons of hoses, replace dried and cracked ones....

The trans shift issue that you describe seems that the trans is being told to hold back the shift, there is a unit at the end of the vacuum tube, AT the trans, called a modulator. They have a rubber diaphram inside that fails and then trans fluid gets sucked into the engine, via this vac. hose. Pull it off and see if any trans fluid comes out...Should be ZERO.

Also, your vehicle must have regular trans service, especially you must change the FILTER. Disk material eventually clogs the filter, then trans fails really fast.

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Why check engine light come on mostly after refuiling after a long drive ?


Because your vehicle is a 2008 I feel it shouldn't be anything to pressing but still take some precautions.

What alot of people don't know is sometimes if the gas cap is not put on tight enough a little air might get in or your gas pump might have to work a little harder because it can't get full vacuum pressure with the cap slightly open. these are not major issues.

these are reasons why your check engine light comes on. It happened to my 2005 Buick Rendezvou We had the check engine light on for a week. The car never shuttered, stalled, delayed starts it ran perfectly fine. I took it in to check engine light their computer showed that it was the EVAP system which is the heating and cooling system I would have to get it checked for leaks or do a static check for leaks.

This didn't look good but then one day I had done some work for a friend told him of my problem he told me it could be my gas cap. The next day I asked my wife if the gas cap was working on vehicle it actually was broke I replaced gas cap and the check engine light came off.

Now with this story (which is true) don't assume every problem could be this. But if you are not noticing any stalls, delayed starts, shuttering anything out of the ordinary check the cap at times to make sure it is closed.

If you keep on having light on and replaced cap or made sure was securely on then take and get it checked out.

merry christmas

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Pressure to the gas tank?


resetting the codes will baseline you yes..disconn battery for while ... if continues you need to find why it is not vapor returning properly likely

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