2002 Toyota V/6 Highlander with 3 engine light codes P 0440, P 0441 & P-0446

Question

I have a 2002 Toyota V/6 Highlander with 3 engine light codes P 0440, P 0441 & P-0446 - what does it mean & what should I do?

Answer 1

P0440 Evaporative emission control system malfunction

P0441 Evaporative emission control system incorrect purge flow

P0446 Evaporative emission vent control circuit malfunction

These 3 code are usually set when there is a airfilter change, and the purge hose for the EVAP system simply got disconnected, the other event would be when there is either a missing fuel cap or loose fuel cap.

 The EVAP purge hose if the hose that leads to the fuel tank for the vent system ever got disconnected , it would set a EVAP vent code malfunction (P0446) and a P0440, This is also the case if the fuel cap was missing or not properly sealing.