Cummins
Cummins fault code
SPN 91 / FMI 2
Cummins Fault Code 431: Accelerator Pedal Idle Validation Circuit - data incorrect
431 on Cummins engines means: Accelerator Pedal Idle Validation Circuit - data incorrect. The failure mode (FMI 2) is “data erratic, intermittent or incorrect”.
Lamp: Yellow
Engine may continue to run, but must be repaired the same day.
Code details
- Manufacturer
- Cummins
- Applies to
- Cummins QS-series electronic engines
- Fault code
- 431
- J1939 SPN
- 91
- FMI
- 2 — Data erratic, intermittent or incorrect
- J1587 PID / SID
- P091
- Engine models
- QSK19, QSK23
- QSK45/60/78 severity level
- QSK45: 3 • QSK60: 3 • QSK78: 3
What to do next
- Read active and inactive codes with the OEM service tool and note the occurrence count.
- FMI 2 tells the shop the type of failure to test for: data erratic, intermittent or incorrect.
- 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
- Cummins Fault Code 431 — Accelerator Pedal Idle Validation Circuit - data incorrect
- Cummins Fault Code 287 — SAE J1939 Multiplexing Accelerator Pedal Sensor System Error
- Cummins Fault Code 432 — Accelerator Pedal Idle Validation Circuit - out of calibration
- PACCAR Fault Code P0121 — Accelerator Pedal – Sticking Pedal
- PACCAR Fault Code U1703 — Remote Pedal – Voltage Too Low or Short Circuit to Ground
- PACCAR Fault Code U177B — Accelerator Pedal 1 – Voltage Too High or Short Circuit to Supply on ECU (D420) Pin (B41)
- PACCAR Fault Code U177C — Accelerator Pedal 1 – Voltage Too Low or Short Circuit to Ground on ECU (D420) Pin (B41)
- PACCAR Fault Code U177D — Accelerator Pedal Sensor 1 Duty Cycle – Data Valid But Too High on ECU (D420) Pin (B41)
Source: Cummins "Diagnostic Fault Codes For Cummins Engines", publication 80-1044 Rev 5/2013, page 13. See also OBD-II codes.