B5.9G, B5.9LPG, B Gas Plus, B LPG Plus – Engine Shuts Off Unexpectedly or Dies During Deceleration

Symptom Tree  

Fuel level is low in the tank

Fill the supply tank. Refer to the OEM service manual.


Electronic fault codes are active

For instructions on how to read active fault codes, refer to Procedure 101-007 (Electronic Controlled Fuel System) in Section 1. If fault codes are active, contact a Cummins Authorized Repair Facility.


OEM engine protection system is active or is malfunctioning

Isolate the OEM engine protection system. Follow the OEM service manuals to check for a malfunction.


Engine will not restart

Refer to the Engine Difficult to Start or Will Not Start symptom tree.


Battery voltage supply to the electronic control module (ECM) is low, interrupted, or open

Check the battery connections, the fuses, and the unswitched battery supply circuit. Refer to the OEM service manual.


Keyswitch circuit is malfunctioning

Check the vehicle, equipment, or vessel keyswitch circuit. Refer to the OEM service manual.


Ignition coil malfunctioning

Check the ignition coil. Refer to Procedure 013-012 (Ignition Coil) in Section 6.


Fuel grade is not correct for the application or the fuel quality is poor

Operate the engine from a tank of high-quality fuel. Refer to Procedure 018-002 (Fuel Recommendations and Specifications) in Section V.

Contact a Cummins Authorized Repair Facility

Last Modified:  16-Feb-2005