Cummins/Onan ISX15 CM2350 X101 Engine

How to read your Cummins/Onan engine serial & model number →

• Wait-to-Start 400040
  Fix: Wait for the Wait-to-Start lamp to turn off before starting the engine
• OEM engine protection system is malfunctioning
  Fix: STEP 6: Isolate the OEM engine protection system. Follow the OEM service manual instructions to check for a malfunction.
• Moisture in the wiring harness connectors
  Fix: STEP 5: Dry the connectors with Cummins® electrical contact cleaner, Part Number 3824510. Refer to equipment manufacturer service information.
• Low Oil Pressure 11000252
  Fix: Shut off the engine immediately to avoid damage
• Engine Starts But Will Not Keep Running
  Cause: Fuel level is low in the tank, Battery voltage supply to the control module (ECM) is low, interrupted, or open, Idle speed is set too low for accessories, Engine-driven units are engaged
  Fix: Fill the supply tank. Check the battery connections. Adjust the low-idle screw. Disengage engine-driven units.
• Engine Shuts Off Unexpectedly or Dies During Deceleration
  Fix: STEP 4: Refer to the Engine Difficult to Start or Will Not Start troubleshooting symptom tree in Section TS.
• Engine Runs Rough or Misfires
  Fix: STEP 4: Allow the engine to warm to operating temperature. If the engine will not reach operating temperature, refer to the Coolant Temperature ig Below Normal troubleshooting symptom tree in Section TS.
• Engine Runs Rough at Idle
  Cause: STEP 4: Allow the engine to warm to operating temperature. If the engine will not reach operating temperature, refer to the Coolant Temperature ig Below Normal troubleshooting symptom tree in Section TS.
• Battery voltage supply to the engine control module (ECM) is low, interrupted, or open
  Fix: STEP 7: Check the battery connections, the fuses, and the unswitched battery supply circuit. Refer to equipment manufacturer service information.
• Air in the fuel system
  Fix: STEP 8: Check for air in the fuel system. Tighten or replace the fuel connections, fuel lines, fuel tank standpipe, and fuel filters as necessary.

Compiled from service & troubleshooting documentation across every generator set that uses the Cummins/Onan ISX15 CM2350 X101.

Pooled from every document that names this exact engine — confirm the interval and part number against your unit's serial number.