This code 151 DTCs document is a 4-page diagnostic reference for the ISB6.7 CM2150 engine coolant temperature fault. It explains the code reason, ECM response, coolant temperature sensor circuit description, and the guided troubleshooting entry point. The file is intended for service work where the red STOP ENGINE light, derate, or engine protection shutdown may be involved.
Official code 151 DTCs document details
| Brand | Cummins |
|---|---|
| Model coverage | ISB6.7 CM2150 (2007-09) |
| System/Group | DTCs; Coolant Temperature Sensor Circuit |
| Publication no. | Not shown in extract |
| Year/Revision | Last Modified: 20-Jul-2010 |
| Pages | 4 |
| File size | 0.2 MB |
| Format | |
| Language | English |
Document table of contents
- Overview
- Circuit Description
- Component Location
- 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
- Associated Procedures
- Troubleshooting Steps
- Guided Step 1 – Check for sensor circuit fault codes.
- Guided Step 1A – Check for Fault Codes 144 and 145.
Applicable truck models
This file covers Cummins ISB6.7 CM2150 (2007-09) DTC information and also references service manual symptom trees for ISB CM2100 and CM2150, ISBe and ISDe CM2150, B3.3 and QSB3.3 CM2150, ISC and ISL Engines CM2150, and ISLe CM2150. The diagnostic describes Fault Code: 151, PID: P110, SPN: 110, FMI: 0/0, and a red lamp condition where engine coolant temperature is data valid but above the most severe operating range. For manufacturer information, visit the Cummins official website.
Who needs this code 151 DTCs manual
Workshop owners, diesel technicians, and fleet mechanics need this code 151 DTCs manual when diagnosing high coolant temperature warnings on CM2150-controlled engines. It helps confirm whether active Fault Codes 144 and 145 must be handled first, or whether the Engine Coolant Temperature Above Normal symptom tree should be used.
The document states that the coolant temperature sensor is a variable resistor sensor supplied with 5 volts by the ECM on the signal circuit. It describes the sensor location on the exhaust side of the engine near the thermostat housing, the continuous diagnostic run condition with the keyswitch ON, and the ECM calibration check through QuickServe® Online. When active, the ECM illuminates the red STOP ENGINE light, reduces torque output, decreases maximum engine operating speed, and may shut the engine down if Engine Protection Shutdown is enabled. Full PDF available in the DiagTechPro manuals library, free account required to download.
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