SPN 5201 — Speed sensor, poor communication on the line (Renault Trucks)

Safe to driveDrivable, but watch it yourself

SPN 5201 is a manufacturer number outside the standard J1939 table: different makes can put different things under it. Below — how it is worded by Renault Trucks, and what the second half of the code (FMI) means.

Renault Trucks

FMI 4

Speed sensor, poor communication on the line. Repair: Replace the sensor and pair it. If the fault persists, replace the tachograph.

What FMI means in J1939

SPN 5201 FMI 45201/4 · 5201.4

voltage below normal or shorted to ground

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 5002Reverse Current Range Setting
• SPN 5003Grapple/Magnet Select Switch
• SPN 5008Magnet Forward Current
• SPN 5100A permanent open circuit detected
• SPN 5200Speed sensor, incorrect sensor serial number
• SPN 5264EGR2 valve position (2nd exhaust gas recirculation circuit)
• SPN 5400
• SPN 5402CAN data bus fault
• SPN 5430EGR 1 Inlet Absolute Pressure
• SPN 5500Button lock fault

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