Engine Starts But Will Not Keep Running

Symptom Tree  t072

This is symptom tree t072
Cause Correction

Electronic fault codes active or high counts of inactive fault codes

Refer to Section TF for fault code troubleshooting.


Idle shutdown or PTO shutdown features are activated

Check the time limit on idle and PTO shutdowns with an electronic service tool. Refer to the appropriate electronic service tool manual.


Fuel level is low in the tank

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


Battery voltage is low

Check the batteries and the unswitched battery supply circuit. Refer to Procedure 019-087 and the OEM service manual.


Vehicle parasitics are excessive

Check the vehicle brakes for dragging, transmission malfunction, cooling fan operation cycle time, and engine-driven units. Refer to the OEM service manual.


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 the Fuel for Cummins Engines, Bulletin 3379001.


Engine position sensor (EPS) damaged

Check the EPS. Refer to Procedure 019-038.


Keyswitch voltage intermittent

Check keyswitch voltage when engine dies. If voltage does not measure 9 to 32 VDC, troubleshoot keyswitch circuit. Refer to Procedure 019-064.


Battery voltage is low or bad ground connection at battery

Check the batteries. Check the battery circuit. The battery cable ground must measure within OEM specifications for voltage drop under electrical load. Refer to Procedure 019-087.

Last Modified:  02-Feb-2004

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