Code P0446 - Ranger-Forums - The Ultimate Ford Ranger Resource


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Old 02-15-2014
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Code P0446

Hey guys my name Josh i have a 2009 ford ranger 4.0L sport 4x4 i have had this code come up quite a few time now i shut it off with a code reader, but lately when i go to fill the gas tank up its air locked or i think it is cause it keeps shutting of and gas comes out, so would that be the carol canister if so how do i change it, any thing would be a big help thanks
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Old 02-15-2014
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Code P0446 is in reference to the Vent solenoid.
The charcoal canister should be located near the radiator support, the vent valve is usually near it.
It will have a 2 wire connector, when key is on there will be 12v on 1 wire, the other wire goes to the computer(PCM), the computer grounds that wire to open and close solenoid.
Code P0446 usually means there is a fault in that circuit.
If you give the solenoid 12v and a ground it should "click"

On the larger filler hose for the gas tank there is a smaller vent hose that runs right next to it, this allows air to come out of the tank while you are filling the tank.
At the top off the filler neck you should see were that vent hose connects, on some you can put a small rubber hose on it and blow, to see if it is clear.
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Old 02-16-2014
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o ok i have tryed blowing it out before it worked for a wile but code comes back all the time and then after a wile does the same thing so mybe i have to replace the Vent solenoid then, so what causes this to mess up,
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Old 02-18-2014
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hey guys well i took the truck to the ford dealer to day to get the code looked at, any way the wiring fell down on to the front drive shaft and rubbed through one of the wires and shorted out the pcm i guess so now there goin to put a new one in.
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