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SPN 3563 — Intake Manifold 1 Absolute Pressure

Safe to driveEnough to reach the yard

J1939 code SPN 3563. Below — how the fault is worded at the factory by SITRAK, and what the second half of the code (FMI) means in the standard.

SITRAK

FMI 1Offset error of the PFM differential pressure sensor. Scan tool code: P010A. Effect: Torque may be limited.
FMI 2PFM differential pressure sensor signal above the upper limit. Scan tool code: P010A. Effect: Torque may be limited.
FMI 3PFM differential pressure sensor signal below the lower limit. Scan tool code: P010A. Effect: Torque may be limited.
FMI 4Internal error of the PFM differential pressure sensor. Scan tool code: P010A. Effect: Torque limited, the engine may shut down.
FMI 5Communication error on the second SENT line of the PFM sensor, pressure and temperature. Scan tool code: P010A. Effect: Fan and warm-up control may misbehave.
FMI 6Voltage too high on the second SENT line of the PFM sensor. Scan tool code: P010A. Effect: Fan and warm-up control may misbehave.
FMI 7Voltage too low on the second SENT line of the PFM sensor. Scan tool code: P010A. Effect: Fan and warm-up control may misbehave.
FMI 8Communication error on the SENT line of the PFM differential pressure sensor. Scan tool code: P010A. Effect: Torque may be limited.
FMI 9Voltage too high on the SENT line of the PFM sensor. Scan tool code: P010A. Effect: Torque may be limited.
FMI 10Voltage too low on the SENT line of the PFM sensor. Scan tool code: P010A. Effect: Torque may be limited.
FMI 15MAP pressure above expected value

What FMI means in J1939

SPN 3563 FMI 13563/1 · 3563.1data below normal range (most severe level)
SPN 3563 FMI 23563/2 · 3563.2data erratic or intermittent
SPN 3563 FMI 33563/3 · 3563.3voltage above normal or shorted high
SPN 3563 FMI 43563/4 · 3563.4voltage below normal or shorted to ground
SPN 3563 FMI 53563/5 · 3563.5current below normal or open circuit
SPN 3563 FMI 63563/6 · 3563.6current above normal or grounded circuit
SPN 3563 FMI 73563/7 · 3563.7mechanical system not responding
SPN 3563 FMI 83563/8 · 3563.8abnormal frequency or pulse width
SPN 3563 FMI 93563/9 · 3563.9abnormal update rate
SPN 3563 FMI 103563/10 · 3563.10abnormal rate of change
SPN 3563 FMI 153563/15 · 3563.15above 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: Enough to reach the yard

Boost is not reaching its target: turbo, intercooler or intake. The engine compensates with mixture and runs hotter than usual.

You will lose pull, burn more fuel and add overheating on long climbs. If you hear a whine or a whistle from the turbo, stop — the wheel is breaking up.

This is an electrical fault: an open, a short or a bad contact in the sensor circuit. The value it measures is most likely fine. You can drive. But until the circuit is repaired this system runs blind and cannot warn you about a real failure.

That said, the manufacturer flags this code as critical — if in doubt, it is safer to stop and check on the spot.

What to check on the spot

Inspect the air filter and charge-air hoses: leaks and cracks produce exactly these codes.

Nearby: intake / boost

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