Do not driveTo the nearest safe stop
SPN 470 is a manufacturer number outside the standard J1939 table: different makes can put different things under it. Below — how it is worded by Ford Trucks, and what the second half of the code (FMI) means.
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 0 | EMS Internal Temperature Sensor Internal Fault. FODP code (scan tool): P0667-22. |
| FMI 1 | EMS Internal Temperature Sensor Internal Fault. FODP code (scan tool): P0667-21. |
| FMI 3 | EMS Indoor Temperature Sensor Electrical – On / Off Power. FODP code (scan tool): P0669-00. |
| FMI 4 | EMS Internal Temperature Sensor Electrical – Chassis Short Circuit. FODP code (scan tool): P0668-00. |
Do not drive. Stop as soon as it’s safe to do so — don’t keep going.
The code is flagged critical: the manufacturer considers it unsafe to keep driving without checking.
This code alone cannot say what will fail next, so stop at the first safe opportunity and look at it on the spot.
That said, the manufacturer flags this code as critical — if in doubt, it is safer to stop and check on the spot.
Scanner threw several codes at once? Paste the whole list — we will show which one is the root cause and which ones simply followed.