Do not driveTo the nearest safe stop
SPN 63 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, Renault Trucks and ZF AS-Tronic, and what the second half of the code (FMI) means.
Ford TrucksRenault TrucksZF AS-Tronic
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 | Information Message: Emission-induced Torque Limitation Active. FODP code (scan tool): P2BAF-00. |
| FMI 3 | Urea Tank Empty. FODP code (scan tool): P2BAF-02. |
| FMI 6 | Information Message: Emission induced Vehicle speed Limitation Active. FODP code (scan tool): P2BAF-04. |
| FMI 8 | PTO sensor fault (the control unit receives a PTO engaged message while PTO control is not active). Repair: Check the cab switch that engages the power take-off. Check the wiring between the Astronic and the PTO sensor (X1B/9). Check the PTO solenoid valve (40 ohms < R < 50 ohms) and its sensor. Run the diagnostic check of the VECU electronic unit. Check the parameters. Switch the ignition off, switch it on again and repeat the test. If the fault persists, replace the control unit. |
ZF AS-Tronic uses its own fault numbering: the number in the table below is an internal ZF code, not a J1939 SPN. It matches the title of this page by digit only and means something different.
| FMI 8 | Fault while engaging power take-off 1 (PTO1). |
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.