Trouble code P0441 and P0446 for Corolla

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Old 06-18-08, 04:27 PM
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Trouble code P0441 and P0446 for Corolla

I took my 1999 Toyota Corolla to auto zone to check the check engine warning light and had trouble code: P0441 AND P0446Auto Zone printed a list of causes that could cause this problem but I wanted to get your opinion. They said it probably is a defective purge or vent solenoids. Any help would be greatly appreciated
 
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Old 06-18-08, 05:18 PM
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P0441 EVAP Control System Improper Purge Flow.
P0446 EVAP Control System Vent Control.

This indicated a problem with the evap emission control system. This is the part of the emission controls that captures gas vapors in the tank, stores them temporarily in a charcoal cannister, and then burns them by "purging" the charcoal cannister into the intake.

Could be something as simple as a loose or faulty gas cap. Can also be vacuum lines for the purge valve and cannister or a bad purge valve itself. Question: Do you routinely "oversqueeze" when you are fueling, i.e. keep filling past the pump cut-off?

Here's some info; it's for slightly earlier model, but will be pretty much the same:
http://www.autozone.com/addVehicleId...00c1528006f1b1
 
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Old 06-18-08, 05:27 PM
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Could be something as simple as a loose or faulty gas cap. Can also be vacuum lines for the purge valve and cannister.
Toyota put the purge can and solenoids in a bad spot. They are prone to road salt and debris damage. Look up under the rear of the car behind the rear wheels, for obvious Rot or Road hazard damage, and definitely ensure the Fuel cap is screwed on all the way.
 
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Old 06-19-08, 11:40 AM
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P0441 EVAP Control System Improper Purge Flow.
P0446 EVAP Control System Vent Control.

sounds like evap canister needs to be purged. toyota permits to do so DIY, just very carefully(unless they changed it for your year and on). any repair manual will have proper instructions. same time, purge valve is either bad or clogged. i'd, also, clean EGR valve.
you could try this: replace fuel cap, reset codes at same autozone, they can do this with scanner, and blow system with a can of seafoam x full tank. if the light comes back after seafoam treatment - purge evap canister and check purge valve.
last i remember, evap canister is a large black canister located between the engine and firewall. do not confuse it with a/c expansion canister though. it's rubber hose vs aluminum ones attached, and evap has clamps for easy removal. otherwise, about same size and shape.
friendly suggestion - stay away from cheap gas. it's cheap for reason. costs more in repairs down the road.
 
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