If you indeed have no oil pressure, then the oil pump is probably bad. But saying that, are you sure you have no pressure? The oil pressure sending unit can be bad or disconnected. Also the pressure gage can be bad. An oil pressure test will verify if you indeed have no pressure. Not sure of the engine size but I know on a 2.3l the timing belt can be suspect to although rare if the engine is running ok, and if there is truly no oil pressure you should hear the lifters banging/ and or bottom end knock.
Trouble code P1409 means: EGR Vacuum Regulator Solenoid Circuit
How do u fix a misfire
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Trouble code P0171 means: Fuel System Too Lean (Cylinder Bank 1)
change it
You get somebody else to do it.
change the thermostat
the odometer is driven by a tiny electric motor now what fails on this is tha rubber worm gear now the only way to fix this problem is by buying a whole new spedometer cluster which runs about $300 from ford
you have to go to the car fix to remove it
by a new one
add a couple layers of tape where the switch hits the door jamb. the tip of the switch is worn down.