PACCAR (Kenworth & Peterbilt)
PACCAR fault code
SPN 94 / FMI 4
PACCAR Fault Code P2541: Fuel Pressure – Voltage Too Low or Short Circuit to Ground on ECU (D420) Pin (A50)
P2541 on PACCAR (Kenworth & Peterbilt) engines means: Fuel Pressure – Voltage Too Low or Short Circuit to Ground on ECU (D420) Pin (A50). 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
- P2541
- J1939 SPN
- 94
- 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 P0087 — Fuel Pressure – Data Valid But Too Low, Most Severe
- PACCAR Fault Code P1086 — Common Rail Fuel Pressure – Increase Too Slow
- PACCAR Fault Code P1087 — Fuel Pressure – Data Valid But Too Low, Moderately Severe
- PACCAR Fault Code P1564 — Fuel Pressure – Data Erratic, Intermittent or Incorrect, at Ignition ON
- PACCAR Fault Code P2542 — Fuel Pressure – Voltage Too High or Short Circuit to Supply on ECU (D420) Pin (A50)
- Cummins Fault Code 268 — Fuel Pressure Sensor Circuit - data incorrect
- Cummins Fault Code 546 — Fuel Delivery Pressure Sensor Circuit - shorted high
- Cummins Fault Code 547 — Fuel Delivery Pressure Sensor Circuit- shorted low
Source: PACCAR MX-13 2017–2020 fault code list (Diesel Laptops). See also OBD-II codes.