Check engine light came on, had the codes pulled.
Results:
P0440 EVAP SYSTEM PROBLEM
P0464
P0463 FUEL LEVEL SENDING CIRCUIT HIGH

Solution:
Replace the charcoal canister.
Parts from local dealer: $123.38
Labor: $ 32.50
Tax: $ 9.90
Total (local shop) $165.78

Charcoal canister from St. Charles
delivered to my door: $ 85.32 <img src="/forums/images/graemlins/smile.gif" alt="" />
Thanks Merlin! <img src="/forums/images/graemlins/cheers.gif" alt="" />

Question:

If I install the canister myself will the check engine light turn off? I presume that the codes would likely remain in the memory until it is read and cleared again. But would the light go off?

I could pay the shop the $32.50 to install it for me which would include having the codes cleared. Which might be worth the hassle; never swaped out a charcoal canister but it dosn't look much harder than a fuel fileter. Anyone had an experiance with these things?

Thanks,
-UteTroop

You can clear the codes by either disconnecting the battery or removing the ECM fuse (F12 - 15A fuse in the engine compartment fuse/relay box) for ~30 seconds or so. Removing the ECM fuse is by far the easiest and least bothersome as you don't have to reprogram all of your radio presets <img src="/forums/images/graemlins/smile.gif" alt="" /> .

You can clear the CEL by disconnecting the battery for 15 minutes or so. Alternatively it will clear itself after a certain number of engine cycles. Even Autozone should be able to clear the codes for free.

I don't remember my exact number, but I had a cannister code problem in my 99 Trooper. It happened after I overfilled the gas tank. I checked for loose connectors and hoses, as well as lightly tapped on the solenoids. After clearing the code with my scanner it never came back. Thus you might want to clear your codes and check for a simple connector/hose problem. Give it a few miles to see if the codes come back before spending the bucks for a new cannister.

I forgot to give the outcome of this. I held onto the Canister from St. Charles for some time waiting to see if the CEL would come back on but it never did. So I sent it back to St. Charles and recieved a 100% refund (that place is awesome).

You likely got that code because of a loose gas cap.