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SPN 520192 — factory code KAMAZ, MAZ, SITRAK and others

Do not driveMinutes

SPN 520192 is a manufacturer number outside the standard J1939 table: different makes can put different things under it. Below — how it is worded by KAMAZ, MAZ, SITRAK and YaMZ, and what the second half of the code (FMI) means.

KAMAZMAZSITRAKYaMZ

KAMAZ

FMI 2ECU ADC: reference voltages, test pulse, queue
FMI 3ECU ADC: reference voltages, test pulse, queue
FMI 4ECU ADC: reference voltages, test pulse, queue
FMI 11ECU ADC: reference voltages, test pulse, queue

MAZ

FMI 2Analog-to-digital converter error - Unknown fault. Blink code: 1-1-1. Power will be reduced. Repair: Replace the ECU.
FMI 3Analog-to-digital converter error - Voltage above allowed. Blink code: 1-1-1. Power will be reduced. Repair: Replace the ECU.
FMI 4Analog-to-digital converter error - Voltage below allowed. Blink code: 1-1-1. Power will be reduced. Repair: Replace the ECU.
FMI 11Analog-to-digital converter error - Unknown fault. Blink code: 1-1-1. Power will be reduced. Repair: Replace the ECU.

SITRAK

FMI 10PFM air mass flow sensor physical offset out of range. Scan tool code: P010A. Effect: Torque may be limited.
FMI 16PFM air mass flow signal above the upper limit. Scan tool code: P010A. Effect: Torque may be limited.
FMI 18PFM air mass flow signal below the lower limit. Scan tool code: P010A. Effect: Torque may be limited.
FMI 20Maximum plausibility error of the PFM air mass flow signal. Scan tool code: P010A. Effect: Torque may be limited.
FMI 21Minimum plausibility error of the PFM air mass flow signal. Scan tool code: P010A.

YaMZ

FMI 2Analog-to-digital converter fault (Unknown fault). Blink code: 1-1-1. Power will be reduced. Repair: Replace the ECU.
FMI 3Analog-to-digital converter fault (Voltage above allowable limit). Blink code: 1-1-1. Power will be reduced. Repair: Replace the ECU.
FMI 4Analog-to-digital converter fault (Voltage below allowable limit). Blink code: 1-1-1. Power will be reduced. Repair: Replace the ECU.
FMI 11Analog-to-digital converter fault (Unknown fault). Blink code: 1-1-1. Power will be reduced. Repair: Replace the ECU.

What FMI means in J1939

SPN 520192 FMI 2520192/2 · 520192.2data erratic or intermittent
SPN 520192 FMI 3520192/3 · 520192.3voltage above normal or shorted high
SPN 520192 FMI 4520192/4 · 520192.4voltage below normal or shorted to ground
SPN 520192 FMI 10520192/10 · 520192.10abnormal rate of change
SPN 520192 FMI 11520192/11 · 520192.11root cause not known
SPN 520192 FMI 16520192/16 · 520192.16above normal — moderate severity
SPN 520192 FMI 18520192/18 · 520192.18below normal — moderate severity
SPN 520192 FMI 20520192/20 · 520192.20data drifted high
SPN 520192 FMI 21520192/21 · 520192.21data drifted low

Can I keep driving

Do not drive. Stop as soon as it’s safe to do so — don’t keep going.

What happens if you keep driving

Time you have: Minutes

Part of the brake circuit or ABS/EBS is out of service. The pedal may still feel normal — until the first emergency stop or descent.

Next comes longer stopping distance, a skid on a slick surface, failure on a long downgrade. This is the case where "I will take it slow" does not work.

What to check on the spot

Let the air system build to working pressure and listen for leaks. Don’t drive with faulty brakes.

Where to start

This code is often not the fault itself but a knock-on. If any of these is in the same readout, start with it:

Nearby: brakes

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