Question

2002 Toyota Tundra Limited TRD 4WD, put a new gas cap still gets ck lite P0446 261k miles, which part is bad

Answer 1

Hi there,

The most frequent cause of this code is the vent control valve. If it's stuck open then the computer will set the same code as it will if the gas cap is leaking or the pressure sensor isn't seeing the actual pressure build up.

Answer 2

P0446 TOYOTA Code - EVAP System Vent Control Circuit

Read more: https://www.autocodes.com/p0446_toyota.html