P0450 TOYOTA -

Question

i had replaced a vapor pressoure sensor but the code came back. is there a test plan before the sensor replace like check voltage from ecm and what is the reading should be. thankyou for your time.

Answer 1

Hi there

This code can be generated when you have an evap leak in the system. If the voltage on the pressure sensor doesn't change, then the computer will fault the pressure sensor. I would suggest a smoke test on the evap system to check for the problem.