Question about 2005 Audi A4

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Check Engine Light on

The check engine light came on. All of the onboard checks are ok. The car is making no noises. Gas cap is on tight.

We did change the Right Dipped Headlamp about a week ago.

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Have the engine codes read, the light indicates an emissions problem. Although it runs fine, ignoring the light could result in more trouble an $ if not looked into. Most parts stores will read the codes for free. Ask what they recommend be done to fix the problem indicated by the code. If their answer isn't clear, post the codes here for more info.

Posted on Dec 11, 2008

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Got scan problem numbr P0442 Check engine is


Po442 is an evap leak, this is the fumes from the gas tank, check vacuum lines from engine compartment for any cracks or splits also make sure gas cap is tight and gasket is good, most of the time this is caused from a bad fuel cap, i would replace the gas cap make sure its on tight then drive for a week if the light goes out then problem solved if light is still on after a week of driving then there a leak is the system. hope this helps.

Aug 30, 2010 | 2005 Dodge Grand Caravan

1 Answer

Engine light came on


Make sure your gas cap is tight, at least 5 clicks, sometimes a gas cap that doesn't seal tight will trigger the Check Engine Light. If the light stays on you will need to pull the Trouble Code from the ECM (Computer) using a OBD II scanner.

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Check engine light came on Tuesday afternoon, after I filled the gas tank on Monday afternoon. If the check engine light came on because of the gas cap not being on tight enough, do I just tighten the gas...


Check engine light might have came on because of loose gas tank cap, but it's a good idea to read the code and check if it's not something else, you can take your car to an Auto Zone and they read the code for free and tell you the cause also. But if you want to reset the check engine light, only way is to disconnect the battery terminals and let it set overnight, check engine light will be reset. Hope it helps and let me know if you need more advice. Please don't forget to rate the answer it helps with my ratings, thanks!

Apr 28, 2010 | 2002 Chrysler Town & Country

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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

Dec 25, 2009 | 2008 Hyundai Accent

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2005 check engine light comes on. had advanced


If the light is out, no worries. if it comes back on and the cap is tight, there may be other problems and a qualified repair shop will need to diagnose that for you. It may have a Evaporative Emission Leak.

Nov 10, 2009 | Chevrolet Cavalier Cars & Trucks

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What to do about the check engine light coming on


unplug the positive wire on battery and it will go off...make sure the gas cap is always tight and the engine isnt running while filling the fuel tank...beleive it or not this will cause the light to come on

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Malfunction symbol appearing


Does it look like an engine? It means you have a problem with the engine. Those vans don't have a low coolant sensor.

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Check engine light/gas cap will not stay tight.


Yes, the gas cap will cause the Check Engine Light to come on. Will set code P0441 if I remember correctly. It should be okay to drive it. If you would like to confirm the code, take the truck to an auto parts store like Autozone and have them hook up their scan tool and read the code. If its P0441 it will probably be something like EVAP or Evaporative system leak.

Its an easy enough fix while your there too, just pick up a new gas cap or you could pick up an OEM one from the dealership.

Dec 31, 2008 | 2005 Chevrolet Colorado

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Engine light


I doubt the gas cap is related to the light, though hopefully you can get a replacement for it because it can be dangerous. As for the check engine light I'm not sure what it could be. Is the car running making noises, does it stall?? If there are no obvious symptoms, you might need to take it to a mechanic so they can read the error message from the cars computer and determine where th eproblem is.

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