01 dodge ram 1500 5.2 4WD code P0455 evap system leak.

It appears that the hose to the carbon canister is either disconnected or has a hole in it. It won't hurt your car to drive it this way. If you are really concerned about it, replace the carbon canister and the connecting hose and forget about it for another 15 years or so.

ok code po455 is a code for the evaporative control monitor,for this i would suggest you check the dealer because its a very large leak in the evap system,and for the po456 which is a very small leak in the evap system

P0442 Means you have a small leak in your EVAP system. P0455 is a large leak.
The EVAP system prevents gas vapors from entering the air .
This code can be set by a leak in the lines or a clogged charcoal canister.
Most common reason is If you did not put your gas cap on all the way.
Hope this helps
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Bank 1 is the same side of the engine as the number one cylinder. Bank 2 is the other side of the engine. Sensor one is always before the catalytic converter. Sensor 2 is always after the catalytic converter.

P0455 is an EVAP leak check the evap hoses for cracks/leaks.

P0700 is a generic code that lets you know you need to scan the transmission control module to see what codes are stored in it.

I’m happy to assist further over the phone at https://www.6ya.com/expert/jeremy_d728a59f986299fa

Code 352 means ignition coil 2 and 356 means ignition coil 6 not plugs. Code 420 means catalyst system below threshold most likely caused by the coil problem. Code 455 means exhaust leak.

po442 evap system small leak po455 evap system large leak po456 evap system very small leak. the evap system is located under the driverside of van. from all indication you have a hole in a line or a bad connection on one of the lines. inspect and repair.

That last time I fixed this code it ended up being a leaking EVAP hose on top of the fuel tank. I had to drop the tank and put new sealant on the hoses to stop the leak.

P0455=EVAP Emission Control System Leak (Large Leak)

Possible gas cap fix, cheapest try first.

Check the gas cap thoroughly, the P0455 code your getting for the large leak isusually a bad gas cap.

Also check the lines on the canister tank,right underthe passengers side of the cab, there are two lines on top that will rotand fall off or get loose enough that they will cause that problem.

You can also check on the passengers side fender well under the hood andlook at the elbows on the EVAP valve that has the hoses that run downto the canister tank, chances are one of them is loose or bad.

Best to get a factory service manual to have handy through all of this. Promanuals.net has complete factory ones for around 20 bucks. Here is a link 2001 Dodge Ram Service Manual.

http://www.obd-codes.com/p0441
and
http://www.obd-codes.com/p0455

P0455 is a EVAP system leak detected code check to make sure your gas cap is tight or if you put gas in it while it was running and can set it . First tighten the gas cap then clear the code and drive and see if the code comes back.