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  #1  
Old 05-27-2015
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Truck throwing 2 codes

I have a 2011 Ranger 4.0L from canada

My truck is throwing 2 codes, P0446 and P0453, both related to evap.
- Ive checked vapor canister -> not clogged
- Ive check vapor canister solenoid -> open and closes, fully
- Ive checked tube from gas tank to vapor canister -> also, not clogged

Here's what the code descriptions are:
P0446 - Evaporative System Vent Control Circuit Malfunction
P0453 - Evaporative Control System Pressure Sensor High Input

Ive erased the codes, but 2 remained, even if CEL was off, could this be why the codes always comeback? If not, HELP im flat out ion ideas
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Old 05-28-2015
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EVAP system codes take awhile to clear, up to 5 drive cycles, 5 warm up cool downs.

The computer runs a self check when truck is off, you can't force it to do it, it just does it when it feels like it, lol.
Best thing to do for now is to never left the tank get below 1/4, and don't fill it up, just fill it to 3/4.
Do this for next 5 drive cycles and see if CEL comes on.
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Old 05-28-2015
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Thanks RonD. I have tried, the truck has failed :P

Reset the CEL last night, started the truck only this morning and no light HOORAY!, I had to make a stop on the way to work; when I fired 'er up again, the CEL was back :'(
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Old 05-28-2015
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OK, then
P0446 is most common when fuel cap is off or not sealing tank
The Computer closes the vent solenoid then tests if tank can hold vacuum
If tank's pressure sensor say "no" then computer sets P0446

P0453 is the code for tank's pressure sensor voltage being out of range.
This could be a bad sensor or shorted wires, and it would also cause P0446 because test couldn't be completed.

Tank's pressure sensor is on top of the tank, but you can test the sensor:
Remove the gas cap(to remove any pressure in the tank), and turn on the key, with the OBD II reader hooked up use live scan to check the voltage of the Fuel tank pressure sensor, should be about 2.5v with gas cap off.
If it is then problem is not the sensor, if it is above 4v then could be wires or bad sensor, you will need to access sensors connector to find out which
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Old 05-29-2015
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Swet! Ill check that out this week-end. I've should have easy acces to that sensor, given that I got a 3'' body lift :P
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Old 05-29-2015
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check the filler tube and make sure the clamps are tight. look for any kind of dampness around the filler near the box and the tank. my explorer is throwing a code for evap cause my filler neck is rotted at the clamp at the top. maybe somthing came loose during the lift procedure.
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  #7  
Old 06-02-2015
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Quote:
Originally Posted by RonD View Post
OK, then
P0446 is most common when fuel cap is off or not sealing tank
The Computer closes the vent solenoid then tests if tank can hold vacuum
If tank's pressure sensor say "no" then computer sets P0446

P0453 is the code for tank's pressure sensor voltage being out of range.
This could be a bad sensor or shorted wires, and it would also cause P0446 because test couldn't be completed.

Tank's pressure sensor is on top of the tank, but you can test the sensor:
Remove the gas cap(to remove any pressure in the tank), and turn on the key, with the OBD II reader hooked up use live scan to check the voltage of the Fuel tank pressure sensor, should be about 2.5v with gas cap off.
If it is then problem is not the sensor, if it is above 4v then could be wires or bad sensor, you will need to access sensors connector to find out which
Do you know where I can purchase this sensor, for under 300$
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Old 06-02-2015
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I would first see if the connector is OK.
I would check what years and models use the same sensor, then..........hit the wrecking yards for a replacement.

They would most likely use the same sensor on cars or trucks
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