po452 code for 99 silverado 2500 ls

Question

I have a obd2 code here po452 what is this how do i fix

Answer 1

Hi there,

The code is for the fuel tank pressure sensor. The code usually is caused by some other issue with the evap system on the truck. A vent control valve that is stuck open, or a broken line in most cases will cause the pressure sensor code because it doesn't change. Since the computer doesn't see a change in the voltage from the sensor it will code it.