Fix for 1998 lexus es300 po441 code

Question

I have already replaced gas cap, all hoses going to and from charcoal canister and replaced the vsv on canister. Have also did a pressure and vacuum test on canister which showed it would hold pressure and vacuum.

Answer 1

P0441 Evaporative emission system incorrect flow

Several area are going to cause a P0441, on the throttle body there is a hose that goes to the evap system . Some model have it at the air filter housing which is before the MAF (mass airflow ) sensor if that discoonects you set a P0441. and then  again there are some engine that do not have a MAF sensor and there is a broken air duct if there a tear there is no or incorrect flow for the evap to operate. The last resort is the vsv pressure sensor. P0441 this code particular on a Lexus or Toyota is commonly seen after a air filter check where the hose get disconnected and it is not noticed.