Cummins ISX11.9 CM2250 – Service Manual Engine Will Not Shut Off

Electronic fault codes active or high counts of inactive fault codes

Refer to Fault Code Troubleshooting Manual, Bulletin 4022225.

Keyswitch circuit is malfunctioning

Check the vehicle, equipment, or vessel keyswitch circuit. Refer to
Procedure 019-064 in Section 19
.

Injector is malfunctioning

Perform the automated cylinder performance test. Replace injectors as necessary. Refer to
Procedure 006-026 in Section 6
.

Engine is running on fumes drawn into the air intake

Check the air intake ducts. Locate and isolate the source of the fumes. Repair as necessary. Refer to the OEM service manual.

Turbocharger oil seal is leaking

Check the turbocharger compressor and turbine seals. Refer to
Procedure 010-033 in Section 10
.