P1280 Ford Code - Injection Control Pressure Circuit Out Of Range Low
- Faulty Injection Control Pressure (ICP) Sensor
- Injection Control Pressure Sensor harness is open or shorted
- Injection Control Pressure Sensor circuit poor electrical connection
- Faulty Powertrain Control Module (PCM)
P0475 Ford Code - Exhaust Pressure Control Valve Malfunction
- Faulty Exhaust Back Pressure Valve
- Exhaust Back Pressure Valve harness is open or shorted
- Exhaust Back Pressure Valve circuit poor electrical connection
P1211 Ford Code - Injector Control Pressure Not Controllable Pressure Above/Below Desired
- Low Reservoir Oil Level
- Poor Oil Quality Injector "O" Ring Leak
- Faulty Injection Pressure Regulator (IPR) Valve
- Faulty Oil Pressure Pump Faulty Powertrain Control Module (PCM)
Did you put in a Motorcraft ICP sensor? If not, they tend to fail soon.
P0475 - you can delay troubleshooting that but please inspect the wiring. It is the sensor on the HPOP access cover.
P1211 -- a faulty IPR is a constant cause of "crank, no start. Inspect the wiring. Pull the tin nut and the copper actuator cylinder. Oil? That will screw with you.
P1211 - put a tube on the fuel bowl drain valve, and run it down in front of your axle. Tie it off with zip ties. Then you can drain your fuel carefully. Inspect it. Oil in there? (Black) Open your fuel bowl and check your filter. Black? Then you have oil getting past the injector o-rings and returning in the fuel to the fuel tank. To be sure, change the fuel filter and check it again in a couple of months. This may be a warning from the engine that it wants injectors rebuilt.
How many miles on the engine?
Step one - check the wiring on the sensors (ICP, IPR, and EBP). Broken wires in the insulation really messed me up on my two trucks.
Step two - REMOVE the wire from the relay to the Air Heater. It goes live and can fry.
Step three - the fuel check.