SPN 4089 — Sensor wheel speed, wheel 8 (Knorr-Bremse EBS and MAN)

Safe to driveUntil the next service

SPN 4089 is a manufacturer number outside the standard J1939 table: different makes can put different things under it. Below — how it is worded by Knorr-Bremse EBS and MAN, and what the second half of the code (FMI) means.

Knorr-Bremse EBS

FMI 9

Sensor wheel speed, wheel 8. Faulty device

MAN

FMI 9

Sensor wheel speed, wheel 8. Faulty device

What FMI means in J1939

SPN 4089 FMI 94089/9 · 4089.9

abnormal update rate

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: Until the next service

A standalone fault with no immediate consequences for driving.

Show the codes at the next service. If a second code from the same system appears, stop putting it off.

Nearby: other

• SPN 4084
• SPN 4085
• SPN 4086Sensor wheel speed, wheel 7
• SPN 4087Sensor wheel speed, wheel 7
• SPN 4088Sensor wheel speed, wheel 8
• SPN 4091Wear indicators brake pads, wheel 7
• SPN 4092Brake pad wear sensor
• SPN 4093Wear indicators brake pads, wheel 8
• SPN 4097Pressure control module, wheel 1, test error in EBS unit
• SPN 4098Pressure control module, wheel 1, unknown module error

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