P0420 & P0430 Toyota Sienna LE 2011

Question

What I should do to turn off the CHK VSC SYSTEM light instead of replacing the catalyst and oxygen sensors?

I would appretiate for this INFO

Yours sincerely,

Andreo Grzebowski

Answer 1

Anytime the CK ENG LT comes on the ABS and TRAC light are disabled. The reason for this is  safety, when the CK ENG LT appear the vehicle is no longer within manufactuer specifications.the ABS and TRAC relies on the powertrain performance being within manucatuer performance. the only way is to repair the condition of the ABS and TRAC from being disabled is to repair the cause of the CK ENG LT. What you have coded is P0420 and P0430 do both front 02 sensor or the upstream 02 sensor. perform a MAF cleaning see if that helps and clear the CK ENG LT