P0456 Code

[t-bank]

My 2003 Ram 1500 (4.7 litre with approx. 61,000 miles) recently threw up a check engine light which my local Auto Zone read as a P0456 Emission Control Evaporative Leak. The guy at A/Z told me this indicated a very small leak and suggested checking the gas cap. It seemed to check out just fine but after he reset the code, it came back up again after a couple of weeks driving. Other than that the truck runs great. Should I just replace the cap and see if this corrects the problem?
Any suggestions would be much appreciated.

Thanks - T-bank

[crazys182003]

I personally would heck the ags cap is only a few bucks and if it don't fix it at elast you would have an extra laying around when you need it.

[imtheoneandonlyD]

I've heard of some of the lines on the fuel tank cracking. I would take a look under there as well.

[t-bank]

Thanks for the input. I picked up a new gas cap last night and will put it on tonight. I also plan on checking out all the vacuum lines.
I'll let you know how this works out.

[t-bank]

Found a hose on the vapor recovery tank cracked pretty badly. I replaced the hose and the gas cap and disconnected the battery to reset the check engine light. So far, so good.

[Redwanr50]

Another thread mentioned the rubber around the fill port to the tank was cracked from the gas fill nozzle. A place to look. That person replaced the cap three times before finding this crack.