ISBe/ISB Series Engines – Engine Speed Surges in PTO or Cruise Control

Electronic fault codes are active

For instructions on how to read active fault codes, refer to Diagnostic Fault Codes in Section 1. If fault codes are active, contact a Cummins Authorized Repair Facility.

Engine speed also surges at idle

Refer to the Engine Speed Surges at Low or High Idlesymptom tree.

Engine speed surges while in the normal operating range and notin PTO or cruise control

Refer to the Engine Speed Surges at Low or High Idlesymptom tree.