PACCAR (Kenworth & Peterbilt)
PACCAR fault code
SPN 1348 / FMI 21
PACCAR Fault Code P2151: Common Rail Pump Unit 2 – Voltage Too High or Short Circuit to Supply on ECU (D420) Pin (A27)
P2151 on PACCAR (Kenworth & Peterbilt) engines means: Common Rail Pump Unit 2 – Voltage Too High or Short Circuit to Supply on ECU (D420) Pin (A27).
Code details
- Manufacturer
- PACCAR (Kenworth & Peterbilt)
- Applies to
- PACCAR MX-13 (2017–2020)
- Fault code
- P2151
- J1939 SPN
- 1348
- FMI
- 21
- 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 21 tells the shop the type of failure to test for: .
- 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 P2150 — Common Rail Pump Unit 2 – Voltage Too Low or Short Circuit to Ground on ECU (D420) Pin (A27)
- PACCAR Fault Code P2150 — Common Rail Pump Unit 2 – Voltage Too Low or Shot Circuit to Ground on ECU (D420) Pin (A27)
- Cummins Fault Code 273 — High Fuel Pressure Solenoid Valve #2 Circuit - shorted low
- Cummins Fault Code 274 — High Fuel Pressure Solenoid Valve #2 Circuit - shorted high
- Cummins Fault Code 282 — High Fuel Pressure Solenoid Valve #2 - mechanically stuck
- Cummins Fault Code 328 — Fuel Pumping Element #2 (Rear) - mechanically stuck
Source: PACCAR MX-13 2017–2020 fault code list (Diesel Laptops). See also OBD-II codes.