Cummins
Cummins fault code
SPN 626 / FMI 1
Cummins Fault Code 487: Start Assist Device - Canister Empty (Ether Injection)
487 on Cummins engines means: Start Assist Device - Canister Empty (Ether Injection). The failure mode (FMI 1) is “data valid but below normal operating range (most severe)”.
Lamp: None
Information only – no lamp action.
Code details
- Manufacturer
- Cummins
- Applies to
- Cummins QS-series electronic engines
- Fault code
- 487
- J1939 SPN
- 626
- FMI
- 1 — Data valid but below normal operating range (most severe)
- J1587 PID / SID
- S237
- 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 1 tells the shop the type of failure to test for: data valid but below normal operating range (most severe).
- 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 381 — Intake Air Heater (Relay Enable) #1 Circuit - data incorrect
- Cummins Fault Code 382 — Intake Air Heater (Relay Enable) #2 Circuit - data incorrect
- Cummins Fault Code 384 — Start Assist Device Control Circuit Error (Ether Injection)
- International SA 33 SPN 626 FMI 5 — Fuel Heater Relay Under Current Or Open Circuit
- International SA 33 SPN 626 FMI 6 — Fuel Heater Relay Over Current
- PACCAR Fault Code P1693 — Cold Starting Aid – Voltage Too High or Short Circuit to Supply on ECU (D420) Pin (C72) or Pin (C49)
- PACCAR Fault Code P1694 — Cold Starting Aid – Voltage Too Low or Short Circuit to Ground on ECU (D420) Pin (C72) or Pin (C49)
- International Fault Code SPN 626 FMI 3 — Engine Start Enable Device 1: Voltage Above Normal, Or Shorted To High Source
Source: Cummins "Diagnostic Fault Codes For Cummins Engines", publication 80-1044 Rev 5/2013, page 14. See also OBD-II codes.