SPN 3 — factory code ZF AS-Tronic

Safe to driveDrivable, but watch it yourself

SPN 3 is a manufacturer number outside the standard J1939 table: different makes can put different things under it. Below — how it is worded by ZF AS-Tronic, and what the second half of the code (FMI) means.

ZF AS-Tronic

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 5

Short circuit to ground on valve Y3 output (front splitter group). With a direct-drive (DD) gearbox, shifting into the fast group is not possible. With an overdrive (OD) gearbox, shifting into the slow group is not possible.

What FMI means in J1939

SPN 3 FMI 53/5 · 3.5

current below normal or open circuit

Can I keep driving

Safe to drive. Below — how much time you have and what happens if you keep going.

What happens if you keep driving

Time you have: Drivable, but watch it yourself

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.

Nearby: other

• SPN 1Left Front Wheel Speed Sensor
• SPN 2
• SPN 4
• SPN 5
• SPN 6
• SPN 7
• SPN 8
• SPN 9
• SPN 10
• SPN 11

Scanner threw several codes at once? Paste the whole list — we will show which one is the root cause and which ones simply followed.