Question

2005 Saturn L300 3.0L with engine code P0451. Could this be a loose line since I just had my fuel pump replaced?

Answer 1

Hi there,

If the fuel tank pressure sensor wasn't plugged back in tight or if there is an evap leak on the system since the fuel pump was replaced it could cause this code to appear.

Answer 2

P0451 Saturn Code - Fuel Tank Pressure Sensor Performance
Read more: https://www.autocodes.com/p0451_saturn.html