1999 gmc suburban 4x4 it gets trouble codes po452,po453.and po305. know what they are and where they at but can not find any imformation on how to check po452,&453. the po305 had been settings sense i bought it three years ago .i have replaced injector,plugs,wires and distributor.maybe easy and cheap i know i'm dreaming.you may know just what to do any help would be appreciated.thank you for your help. larry
Code P0452 Fuel Tank Pressure Sensor Circuit Low Voltage
Sounds like a faulty fuel tank pressure sensor. It is located on the fuel pump housing.
FUEL TANK PRESSURE SENSOR REMOVAL CAUTION: Refer to Battery Disconnect Caution in Cautions and Notices.
FUEL TANK PRESSURE SENSOR INSTALLATION
Here is the diagnostic procedure for the fuel tank pressure sensor.
Code P0453 Fuel Tank Pressure Sensor Circuit High Voltage
Both of these codes should be solved by replacing the Fuel Tank Pressure Sensor.
About a year ago I replaced the fuel pump and I had to put a different plug on the end of the wire the instructions said that it was a better type of plug maybe that is the problem? Thank You, XXXXX XXXXX
If there is a system pressure leak, then you would have a different code. I believe that the sensor itself has failed.
Please let me know if there is anything else I can do to assist you.