Problem Description and Possible Solution
Intermittent failure of a purge control valve in the evaporative emission system can cause the Check Engine Light to illuminate. A failed valve should be replaced to correct this problem.
Problem DataRepairPal Verified
Average mileage: 123,804 (51,000–201,000)
11 model years affected: 1996
, more2000, 2001, 2002, 2003, 2004, 2007, 2008
27 people reported this problem
Check Engine Light comes on--OBD tool says Incorrect Purge flow--code Po441, and PO446, vent control circuit. Does anyone know what to do here?
Check engine light came on, had Auto Zone test. Showed Evaporation System error, leak or blockage. We haven't determined which at this point. I was searching to find similar problems and how they were solved before we jumped into anything. Thanks for some great advice and I will check with Toyota on helping to fix. Great site!
CEL has come on two different times in last two weeks, once during high humidity after rain storm (tank was 1/4 full - checked fuel cap didn't correct right away but self resolved the next day after sitting over night)and second time during 94 degree day with high humidity and 3/4 full tank - released pressure at gas cap and CEL went off for a short while but came back on. Am going to get replacement factory fuel cal and drive at highway speeds to purge evaporator canister. If that doesn't solve the problem, will take to Toyota dealership to have them check the evaporator system and O2 sensor...
this is the second time in one month that the same problem is there, different ventilator (there are three? of them)--last one cost us 234$ and now we have another. any way to shut off that warning light and live with an unnecessary evap system?