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SPN 520506 — factory code International, Meritor (ex-WABCO) and SITRAK

Safe to driveUntil the next service

SPN 520506 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 2 Cab Switch — RPM 4 Channel 2 Switch Error

Meritor (ex-WABCO)

FMI 7Wheel Speed Permanent Slip Failure at Axle 3 Right
FMI 9Wheel Speed Jump Down Detection at Axle 3 Right
FMI 13Impermissable Tire Size Detected at Axle 3 Right
FMI 14Impermissable Deviation of Tire Size Detected at Axle 3 Right

SITRAK

FMI 2The SCR system did not enter the metering control state in time. Scan tool code: P20FF. Effect: Torque limited, MIL on, power may drop to 60%.

What FMI means in J1939

SPN 520506 FMI 2520506/2 · 520506.2data erratic or intermittent
SPN 520506 FMI 7520506/7 · 520506.7mechanical system not responding
SPN 520506 FMI 9520506/9 · 520506.9abnormal update rate
SPN 520506 FMI 13520506/13 · 520506.13calibration out of range
SPN 520506 FMI 14520506/14 · 520506.14manufacturer-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

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