Cummins ISM code 151 identifies a engine Coolant Temperature – Data Valid But Above Normal Operational Range – Most Severe Level on the Cummins ISM CM871 (2007-09) engine, and this five-page PDF documents SPN 110 / FMI 0/0 (PID P110) in full. It sets out the fault description, component location, shop-talk notes, and a step-by-step troubleshooting tree so a technician can confirm and clear the code with a diagnostic tool.
Cummins ISM code 151 document details
| Brand | Cummins |
| Model coverage | ISM CM871 (2007-09) and ISX CM871 (2007-09) |
| System / Group | DTCs / Coolant Temperature Sensor Circuit |
| PID / SPN / FMI | P110 / SPN 110 / FMI 0/0 |
| Warning lamp | Red |
| Source | TruckFaultCodes.com fault-code library (© 2017) |
| Pages | 2 |
| File size | 0.2 MB |
| Format / Language | PDF / English |
Fault description and meaning
The engine coolant temperature sensor is a variable-resistor sensor used to measure coolant temperature. The ECM supplies 5 volts to the signal circuit and monitors the change in voltage caused by the change in sensor resistance to determine coolant temperature. This document is filed under fault code 151, engine Coolant Temperature – Data Valid But Above Normal Operational Range – Most Severe Level. The condition raises a red warning lamp on the dash. Because the sensor shares supply and return wires in the engine harness with other sensors, the manual advises checking for multiple active faults before starting the 151 procedure.
Document table of contents
- Fault code information: PID P110, SPN 110, FMI 0/0, lamp red
- Description
- Component location
- Shop Talk
- Troubleshooting steps (harness, connector, and ECM checks)
- Circuit-repair verification and code clearing
Applicable truck models
This procedure applies to Cummins ISM CM871 (2007-09) engines. The identical fault code and coolant temperature sensor circuit also appear in the parallel Cummins ISX CM871 (2007-09) listing. The troubleshooting steps inspect the coolant temperature sensor circuit connector pins, verify the 4.75 to 5.25 VDC supply across the sensor, and confirm the fault goes inactive with a diagnostic tool after any repair. Cummins publishes the authoritative service data for these engines on its official website.
Who needs this Cummins ISM code 151 manual
Fleet technicians and workshop owners diagnosing coolant temperature sensor circuit complaints on 2007-09 emissions-era Cummins engines need this sheet to work the fault methodically. It pairs with the wider Cummins ISM CM871 DTC set for full engine-harness coverage.
Related manuals library
The complete PDF is available in the DiagTechPro manuals library; a free account is required to download it.
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