Safe to driveDrivable, but watch it yourself
J1939 code SPN 1583. Below — how the fault is worded at the factory by Ford Trucks, and what the second half of the code (FMI) means in the standard.
Ford Trucks/Ecotorq writes fault numbers in its own format: the code in the table below is a Ford code (hexadecimal, zero-padded), not a J1939 SPN. It matches the standard only where the signal itself is standard, and usually matches the title of this page by digit alone.
| FMI 2 | DPM Output Fuel Pressure – High. FODP code (scan tool): P20DE-01. |
| FMI 3 | DPM Output Fuel Pressure – Low. FODP code (scan tool): P20DE-02. |
| FMI 9 | DPM Inlet Fuel Pressure – High. FODP code (scan tool): P20DE-03. |
| SPN 1583 FMI 21583/2 · 1583.2 | data erratic or intermittent |
| SPN 1583 FMI 31583/3 · 1583.3 | voltage above normal or shorted high |
| SPN 1583 FMI 91583/9 · 1583.9 | abnormal update rate |
Safe to drive. Below — how much time you have and what happens if you keep going.
This is an electrical fault: an open, a short or a bad contact in the sensor circuit. The value it measures is most likely fine.
You can drive. But until the circuit is repaired this system runs blind and cannot warn you about a real failure.
Scanner threw several codes at once? Paste the whole list — we will show which one is the root cause and which ones simply followed.