Cummins ISM code 125 identifies a intake Manifold 1 Pressure – Data Valid But Below Normal Operating Range – Moderately Severe Level on the Cummins ISM CM871 (2007-09) engine, and this five-page PDF documents SPN 102 / FMI 0/16 (PID 102) 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 125 document details
| Brand | Cummins |
| Model coverage | ISM CM871 (2007-09) and ISX CM871 (2007-09) |
| System / Group | DTCs / Intake Manifold 1 Pressure/Temperature Sensor Circuit |
| PID / SPN / FMI | 102 / SPN 102 / FMI 0/16 |
| Source | TruckFaultCodes.com fault-code library (© 2017) |
| Pages | 3 |
| File size | 0.2 MB |
| Format / Language | PDF / English |
Fault description and meaning
The ECM provides a 5-volt supply and a ground return to the intake manifold pressure sensor. The sensor signal voltage changes based on the pressure in the intake manifold, which the ECM uses to manage charge flow into the engine. This document is filed under fault code 125, intake Manifold 1 Pressure – Data Valid But Below Normal Operating Range – Moderately Severe Level. 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 125 procedure.
Document table of contents
- Fault code information: PID 102, SPN 102, FMI 0/16
- 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 intake manifold 1 pressure/temperature sensor circuit also appear in the parallel Cummins ISX CM871 (2007-09) listing. The troubleshooting steps inspect the intake manifold 1 pressure/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 125 manual
Fleet technicians and workshop owners diagnosing intake manifold 1 pressure/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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