2003 Chevrolet Silverado 5.3L, what is the common problem for a P0452 code?

Question

2003 Chevrolet Silverado 5.3L Extended Cab Z71, what is the common problem for a P0452 code? I've already replaced the fuel tank pressure sensor, still have the code po452

Answer 1

Hi there,

Sometimes you will get the pressure code because there is a different issue. A leak in the system and the sensor won't change it's reading the computer will blame the sensor, when really there is an underlying issue.

Comments

Good point on that

Answer 2

Try checking all connections between sensor and ECM. Wiring harness short from installing sensor without first disconnecting the battery, will sometimes destroy your connections.. Or they could've been faulty before replacing FPS. As Carguy1 suggested, could also be a leak that the sensor is failing to report to the ECM.