PACCAR (Kenworth & Peterbilt)
PACCAR fault code
SPN 1078 / FMI 4
PACCAR Fault Code P153B: Crankcase Ventilation Module Rotor Speed – Data Valid But Too Low, Least Severe
P153B on PACCAR (Kenworth & Peterbilt) engines means: Crankcase Ventilation Module Rotor Speed – Data Valid But Too Low, Least Severe. The failure mode (FMI 4) is “voltage below normal, or shorted to low source”.
Code details
- Manufacturer
- PACCAR (Kenworth & Peterbilt)
- Applies to
- PACCAR MX-13 (2017–2020)
- Fault code
- P153B
- J1939 SPN
- 1078
- FMI
- 4 — Voltage below normal, or shorted to low source
- Truck models in source
- Kenworth T680, T880, W900, T800; Peterbilt 579, 389, 567, 367
What to do next
- Read active and inactive codes with the OEM service tool and note the occurrence count.
- FMI 4 tells the shop the type of failure to test for: voltage below normal, or shorted to low source.
- Have a heavy-duty diesel technician confirm the fault against the engine or chassis service manual before replacing parts.
Get this code diagnosed
Send one request and nearby diesel shops and mobile mechanics can quote the repair.
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Related fault codes
- PACCAR Fault Code P153C — Crankcase Ventilation Module Rotor Speed – Data Valid But Too High
- Cummins Fault Code 367 — Fuel Pump Control Module, Increment Angle Time Sensor Error
- Cummins Fault Code 368 — Fuel Pump Control Module, Timing Error
- Cummins Fault Code 369 — Fuel Pump Control Module, Engine Synchronization Error
Source: PACCAR MX-13 2017–2020 fault code list (Diesel Laptops). See also OBD-II codes.