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SPN 520508 — factory code International, Meritor (ex-WABCO) and SITRAK

Safe to driveUntil the next service

SPN 520508 is a manufacturer number outside the standard J1939 table: different makes can put different things under it. Below — how it is worded by International, Meritor (ex-WABCO) and SITRAK, and what the second half of the code (FMI) means.

InternationalMeritor (ex-WABCO)SITRAK

International

FMI 2RPM 4 Channel 3 Cab Switch — RPM 4 Channel 3 Switch Error

Meritor (ex-WABCO)

FMI 7Wheel Speed Permanent Slip Failure at Axle 4 Right
FMI 9Wheel Speed Jump Down Detection at Axle 4 Right
FMI 13Impermissable Tire Size Detected at Axle 4 Right
FMI 14Impermissable Deviation of Tire Size Detected at Axle 4 Right

SITRAK

FMI 2EGR valve blocked: driver inducement, level 1. Scan tool code: P1068. Effect: Torque may be limited.

What FMI means in J1939

SPN 520508 FMI 2520508/2 · 520508.2data erratic or intermittent
SPN 520508 FMI 7520508/7 · 520508.7mechanical system not responding
SPN 520508 FMI 9520508/9 · 520508.9abnormal update rate
SPN 520508 FMI 13520508/13 · 520508.13calibration out of range
SPN 520508 FMI 14520508/14 · 520508.14manufacturer-specific instructions

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

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