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SPN 100 — Engine oil pressure

Do not driveMinutes

J1939 code SPN 100. Below — how the fault is worded at the factory by DAF, Dongfeng, Foton, Isuzu, KAMAZ, MAZ, Renault Trucks, SITRAK, YaMZ and ZF AS-Tronic, and what the second half of the code (FMI) means in the standard.

DAFDongfengFotonIsuzuKAMAZMAZRenault TrucksSITRAKYaMZZF AS-Tronic

DAF

FMI 1Oil pressure F011 pressure too low
FMI 2Oil pressure F011 implausible pressure

Dongfeng

FMI 1Oil pressure too low
FMI 2Incorrect oil pressure signal. Scan tool code: P0521. Effect: Fan and warm-up control may misbehave.
FMI 3Short circuit to power supply of the oil pressure sensor
FMI 4Short circuit to ground or open circuit of the oil pressure sensor
FMI 18Oil pressure too high

Foton

FMI 1Low engine oil pressure
FMI 18Critically low oil pressure

Isuzu

FMI 3Engine oil pressure sensor fault (low voltage fault) (P0522)
FMI 4Engine oil pressure sensor fault (high voltage fault) (P0523)

KAMAZ

FMI 2Oil pressure sensor
FMI 3Oil pressure sensor
FMI 4Oil pressure sensor
FMI 12Oil pressure sensor
FMI 14Engine oil pressure (from PLD/MR2). K-line code on KamAZ-5490: ADM3 10514.
FMI 17⚠ Oil pressure too low

MAZ

FMI 2Oil pressure sensor circuit fault - Plausibility error. Blink code: 2-4-3. Repair: Check the oil pressure sensor wiring.
FMI 3Oil pressure sensor circuit fault - Voltage above allowed. Blink code: 2-4-3. Repair: Check the oil pressure sensor wiring.
FMI 4Oil pressure sensor circuit fault - Voltage below allowed. Blink code: 2-4-3. Repair: Check the oil pressure sensor wiring.
FMI 12Oil pressure sensor circuit fault - Signal error. Blink code: 2-4-3. Repair: Check the oil pressure sensor wiring.
FMI 17Oil pressure too low - Oil pressure low. Blink code: 2-4-3. Power will be reduced. Repair: Check the oil level and the oil pump.

Renault Trucks

FMI 3Oil pressure sensor — short to positive (5 V or battery voltage). Repair: Check the sensor and the wiring (J 1/25, J 1/32, J 1/34). Check the sensor and the engine wiring (A 5, A 18, A 26).
FMI 4Oil pressure sensor — open circuit or short to ground. Repair: Check the sensor and the wiring (J 1/25, J 1/32, J 1/34). Check the sensor and the engine wiring (A 5, A 18, A 26).
FMI 8Transmission output speed sensor fault (tachograph sensor). Repair: Run the diagnostic check of the tachograph unit. Check the programming. Switch the ignition off, switch it on again and repeat the test. If the fault persists, replace the control unit.
FMI 16Oil pressure sensor, supply voltage too high. Repair: Check the sensor, the EECU and the engine wiring (A 5, A 18, A 26).
FMI 18Oil pressure sensor, supply voltage too low. Repair: Check the sensor, the EECU and the engine wiring (A 5, A 18, A 26).

SITRAK

FMI 0Diagnostic: oil temperature too high
FMI 1Oil pressure below protection class 2 threshold
FMI 2Implausible oil pressure sensor signal. Scan tool code: P0521. Effect: Fan and warm-up control may misbehave.
FMI 3High voltage on oil pressure sensor
FMI 4Low voltage on oil pressure sensor
FMI 5Open load in the oil pressure warning lamp circuit. Scan tool code: P160B. Effect: Oil pressure lamp on, engine speed may be limited.
FMI 6Over-temperature of the oil pressure warning lamp powerstage. Scan tool code: P160C. Effect: Oil pressure lamp on, engine speed may be limited.
FMI 8Implausible signal of the digital oil pressure sensor. Scan tool code: P0521. Effect: Oil pressure lamp on, engine speed may be limited.
FMI 15Oil pressure sensor voltage above the upper limit. Scan tool code: P0523. Effect: Engine speed is limited.
FMI 16Oil pressure sensor voltage above the upper limit. Scan tool code: P0523.
FMI 17Engine oil pressure below the lower limit. Scan tool code: P0524. Effect: Engine speed is limited.
FMI 18Oil pressure below protection class 1 threshold
FMI 19Oil sump pressure signal error on the CAN bus. Scan tool code: P0520. Effect: Fan and warm-up control may misbehave.

YaMZ

FMI 2Oil pressure sensor circuit fault (Plausibility error). Blink code: 2-4-3. Repair: Check the oil pressure sensor wiring.
FMI 3Oil pressure sensor circuit fault (Voltage above allowable limit). Blink code: 2-4-3. Repair: Check the oil pressure sensor wiring.
FMI 4Oil pressure sensor circuit fault (Voltage below allowable limit). Blink code: 2-4-3. Repair: Check the oil pressure sensor wiring.
FMI 12Oil pressure sensor circuit fault (Signal error). Blink code: 2-4-3. Repair: Check the oil pressure sensor wiring.
FMI 17Oil pressure too low (Low oil pressure). Blink code: 2-4-3. Power will be reduced. Repair: Check the oil level and the oil pump.

ZF AS-Tronic

ZF AS-Tronic uses its own fault numbering: the number in the table below is an internal ZF code, not a J1939 SPN. It matches the title of this page by digit only and means something different.

FMI 8No signal from the ZF "output shaft 2 speed" sensor.

What FMI means in J1939

SPN 100 FMI 0100/0 · 100.0data above normal range (most severe level)
SPN 100 FMI 1100/1 · 100.1data below normal range (most severe level)
SPN 100 FMI 2100/2 · 100.2data erratic or intermittent
SPN 100 FMI 3100/3 · 100.3voltage above normal or shorted high
SPN 100 FMI 4100/4 · 100.4voltage below normal or shorted to ground
SPN 100 FMI 5100/5 · 100.5current below normal or open circuit
SPN 100 FMI 6100/6 · 100.6current above normal or grounded circuit
SPN 100 FMI 8100/8 · 100.8abnormal frequency or pulse width
SPN 100 FMI 12100/12 · 100.12faulty device or component
SPN 100 FMI 14100/14 · 100.14manufacturer-specific instructions
SPN 100 FMI 15100/15 · 100.15above normal — low severity
SPN 100 FMI 16100/16 · 100.16above normal — moderate severity
SPN 100 FMI 17100/17 · 100.17below normal — low severity
SPN 100 FMI 18100/18 · 100.18below normal — moderate severity
SPN 100 FMI 19100/19 · 100.19error in received network data

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

The oil film in the bearings is already breaking down. Every minute under load is metal on metal on the crank journals.

Next comes spun bearings and a full engine rebuild. Shut it down now and coast to the shoulder without revving.

The pressure itself is most likely fine: this is an electrical fault — an open or a short in the sensor circuit, not lost oil. You can drive, but the dash will no longer warn you about a real pressure drop. Until the circuit is repaired, check the level with the dipstick at every stop.

What to check on the spot

Shut the engine down. Check the oil level with the dipstick and look underneath for leaks. Don’t restart until pressure is back.

Which codes follow

If the value really did go out of range, rather than a sensor circuit being broken, these normally light up after it:

They are not fixed separately — they go out together with this one. The list is deliberately short: only the links the reference is sure about.

Nearby: lubrication

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