This Cummins ISB6.7 151 document explains Fault Code 151 for the ISB6.7 CM2350 engine and its engine coolant temperature protection logic. It identifies PID P110, SPN 110, FMI 0/0, the red STOP lamp response, and the diagnostic steps used to confirm sensor reading accuracy and fault status.
Official Cummins ISB6.7 151 document details
| Brand | Cummins |
|---|---|
| Model coverage | ISB6.7 CM2350 (2013-17) |
| System/Group | DTCs; engine coolant temperature circuit |
| Publication no. | Fault Code: 151; PID: P110; SPN: 110; FMI: 0/0 |
| Year/Revision | Copyright © 2017; vehicle year unknown |
| Pages | 4 |
| File size | 0.1 MB |
| Format | |
| Language | English |
Document table of contents
- Circuit Description
- Component Location
- Reason
- Effect
- Conditions for Running the Diagnostics
- Conditions for Setting the Fault Codes
- Action Taken When the Fault Code is Active
- Conditions for Clearing the Fault Code
- Shop Talk
- Troubleshooting Steps
- Step 1A) Monitor coolant temperature reading.
- Step 2A) Check if an ECM calibration update is available.
- Step 2B) Disable the fault code.
Applicable truck models
This file applies to Cummins ISB6.7 CM2350 engines in the 2013-17 group. The extract does not list truck makes or chassis models, so coverage should be matched by engine platform, ECM family, and the active DTC details shown by the diagnostic tool. The procedure concerns the engine coolant temperature sensor on the thermostat housing, the ECM 5 volt coolant temperature signal circuit, and engine protection behavior when coolant temperature is above the critical limit. For manufacturer information, visit Cummins official site.
Who needs this Cummins ISB6.7 151 manual
Workshop owners, diesel technicians, and mobile mechanics need this manual when an ISB6.7 CM2350 reports Fault Code 151 with a red STOP ENGINE lamp, torque derate, reduced maximum engine speed, or possible engine shutdown. It is also useful when comparing diagnostic tool coolant temperature readings against a mechanical gauge or known value before replacing the coolant temperature sensor.
The procedure states that the ECM sets the fault when coolant temperature is greater than 113°C [235°F] for more than 5 seconds. It also explains validation after repair: key cycle, start the engine, idle for 1 minute, confirm the diagnostic runs and passes, then check that the fault becomes inactive and the red STOP ENGINE lamp turns off. The full PDF is available in the DiagTechPro manuals library, free account required to download.
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