i have a 2007 f150 and my check engine light came on today my edge programmer said its code p0461 somthing to do with fuel system i also just filled my truck up it only shows a half a tank.

 

Are you absolutely sure the code is P0461 - not P0460 or P0463?

There is a TSB (08-2-9) for DTCs P0460 or P0463 and a erratic fuel gauge.

ERRATIC FUEL GAUGE OPERATION - MIL ON - DTCS P0460/P0463 OR INSTRUMENT CLUSTER MODULE DTC B1201 - VEHICLES BUILT BEFORE 12/3/2007

 

yes it code p0461

 

That's a fuel level sensor fault. Makes sense if the tank is full and the gauge only shows 1/2 tank. It is NOT necessarily the sensor itself, it can be anything in the circuit.

 

took truck to dealer replaced the sensor still not fixed now they say it needs new harness for the sensor.