Check Engine Light Due to Failed Charcoal Canister on Toyota 4Runner

Problem Description and Possible Solution

The evaporative emission (EVAP) system may illuminate the vehicle's Check Engine Light due to intermittent failure of the charcoal canister purge control solenoid valve or canister failure. Upon failure of the charcoal canister, debris may circulate around the EVAP system causing other emission control problems.

Problem Data
RepairPal Verified
Average mileage: 159,398 (89,000–290,000)
8 model years affected: 1998, 1999, 2000, 2001, more2002, 2004, 2005, 2009
53 people reported this problem
Viewing 1 - 20 of 21 comments
My situation seems to be almost textbook "average" situation.

1. VSC lights + Check engine lights appear, triggered by idle or slow RPM situation.
2. Tried "fixing" with tightening gas cap, taking neg. terminal off battery for 15 minutes + pulling fuse to reset system.
3. Seemed to work. Went for a couple weeks without lights.
4. Lights returned.
5. Took to repair (dealer) for diagnostics, quoted "bad charcoal canister and/or sensor".
6. Quote: $110 for diagnostics + $500 for part (canister) + $200 labor = $800. (this is at Elmhurst Toyota near Chicago).
Check engine light came on which also triggers lights for Traction Ctrl. Diagnostic shows code 0440.
Replaced charcoal canister
I have read a lot about this problem. Have had the two valves under the hood replaced and replaced the fuel tank. I am smelling gas fumes from under the car and the fuel tank is not holding pressure. I am guessing it is the canister...
Check engine light on and trac control disabled. Gas mileage terrible when code P0440 is set. First tried gas cap from dealer. Nope. Code returns. Smoke test reveals bad charcoal vapor canister. $485 at dealer plus $150 labor to install. I am going to pull canister and look for leak myself before spending that kind of cash.
Check engine light on as well as vsc,trac lights. Dealer pressure tested the evap system
and told me it was my charcoal canister. 435.00 for canister and 150.00 labor. I did not fix and have been
driving it for about 6 months now. I might pull it out and check and replace rubber o rings, and reset the
check engine lights to see if that fixes problem first.
Popping sound from the exhaust when accelerating, mechanics had changed the two O2 sensors, popping still continues even worse, check fuel pump ok, check air flow meter ok,changed fuel filters popping still continues.

Pls kindly advise
saw the check engine light was on as well as one other light (can't remember the name) but at the SMOG check spot, the results showed
"P0440 EVAP CTRL System Malfunction"
Engine light on and I've taken it to two mechanics and they can't seem to fix it, they say I need to take it to the dealership.
Got a new charcoal canister and it still isn't reading, at DEQ it says, Evap Emmision unready. I've done the correct drive cycle for my rig over and over, still isn't better:(
Same issue with Check Engine + VSC Lights stay on. I discounted the battery and the light went OFF, but they came back on after I put 3K mile on the truck.
Same symptoms, same cause: canister failure. Local repair shop in FLL will replace the canister for $675.00