Codes on OBD?!

[lewisn]

P0452 - Evaporative Emission system pressure sensor switch low inpute
P0108 - Manifold Absolute Pressure/BARO Sensor High Inpute


What do these mean????


Thank you!!
Lewis

 

[lewisn]

Could the MAP sensor going bad shut my fuel off? Is there a valve in the fuel lines between the fuel filter and the pump? I have a 2000 yukon xl2500 with 2 fuel tanks.

 

[greenhornet]

My evap. sensor was throwing P0452and i ended up putting a new fuel pump in with a new sensor.I replaced the pump because the fuel level arm assy fell off. so as the new Ac delco pump had a evap. sensor i killed two birds with one stone.