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It should reset itself after a few start/stop cyles.
If not, or you're in a hurry, find the ECM fuse and pull it out, wait a few seconds and replace it.
It could be an emmissions problem. Sometimes even the gas cap being loose can cause a code. Make sure to tighten the cap when done refuelling...you should hear repetitive clicks when its tight. Other components related to code p0172 are o2 sensor(bank 1) and catalytic converters. Hope this helps!
you have a small leak in your evaporative emission system.the first thing to check is your gas cap.make sure to tighten it until it clicks three times.have the code cleared and see if the code comes back.
Sometimes when you dont close your Gas cap tight, the light come on But could be something else detected by the computer. Take it to an auto part and they will scan it for you for free and they will tell you whats the code. Good luck
make sure gas acp is on tight this is a 80% problem most of the time drive it for a couple of miles and might turn off light if not you might have a bad sensor. but do the gas cap first just make sure its on tight make sure it clicks
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.
If the cap was tight. It could be a different leak. Drive a few days. If the light doesnt go out, a Garage will need to check it for you, there may be more to it, like an evaporative leak.
This happened to me as well, just a few weeks after buying our 1999 ES300. Took it into Lexus for regular maintenance and to check this out. Apparently, if you don't replace the gas cap correctly and tight enough this can cause the 'trac off' light to come one. It will go off a little while after the cap has been replaced correctly. This also happened with my 2006 Murano, 'check engine soon' message.
the check engine light is not caused by any wrong fluid level or dirty air filter or anything else like that, it is caused by well over 100 faults that can occur in the computer controlled electronic engine and emission controls, u will need to go to a Kragen or Autozone parts store and get a free OBD 2 fault code test to get the code that set your light.
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