P1233 2003 Ford F150 -

Question

mil was on checked codes po191 on a2005 f150 5.4l truck ran good cleared codes
now truck wont run and codep1233 is coming on during koeo test

Answer 1

P0191 Fuel rail pressure sensor (FPR) circuit performance

When P0191 this also can indicate a failing fuel pump or low fuel pressure.If you now code P1233 check the relay for the Fuel pump driver module.This relay is also for the REM (rear electrinic moduel) . The inertia relay can also cause P1233 and should also be inspected.