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SPN 520310 — Exhaust gas temperature 1 below the lower plausible range limit (Meritor (ex-WABCO) and SITRAK)

Safe to driveUntil the next service

SPN 520310 is a manufacturer number outside the standard J1939 table: different makes can put different things under it. Below — how it is worded by Meritor (ex-WABCO) and SITRAK, and what the second half of the code (FMI) means.

Meritor (ex-WABCO)

FMI 2EAPU - AirDryer/ Pressure Sensor Plausibility Fault
FMI 9EAPU - AirDryer/ Mechanical Mode due to mandatory CAN signals (engine state)
FMI 10EAPU - AirDryer/ Volume Compressor Fault
FMI 14EAPU - AirDryer/No Ambient Temperature Available

SITRAK

FMI 17Exhaust gas temperature 1 below the lower plausible range limit. Scan tool code: P2031. Effect: Fan and warm-up control may misbehave.

What FMI means in J1939

SPN 520310 FMI 2520310/2 · 520310.2data erratic or intermittent
SPN 520310 FMI 9520310/9 · 520310.9abnormal update rate
SPN 520310 FMI 10520310/10 · 520310.10abnormal rate of change
SPN 520310 FMI 14520310/14 · 520310.14manufacturer-specific instructions
SPN 520310 FMI 17520310/17 · 520310.17below normal — low severity

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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