Cummins fault code 227 is documented on this DiagTechPro library page for Cummins ISM CM871 (2007-09) engines, where it flags a Sensor Supply 2 Circuit – Voltage Above Normal Or Shorted To High Source condition (PID S211, SPN 3510, FMI 3/3, Amber lamp). This 3-page PDF reproduces the manufacturer description, shop talk, component location and step-by-step troubleshooting so technicians can confirm and clear the code.
Cummins fault code 227 overview
Cummins defines this code as “SENSOR SUPPLY 2 CIRCUIT – VOLTAGE ABOVE NORMAL OR SHORTED TO HIGH SOURCE” on the Sensor Supply 2 Circuit. The sensor supply 2 of the electronic control module (ECM) provides a 5 volt supply for the camshaft position sensor, exhaust gas pressure sensor, rail fuel pressure sensor, intake manifold pressure/temperature sensor, and crankcase pressure sensor on the ISX engine. For ISM engines, the sensor supply 2 of the ECM provides a 5 volt supply for the camshaft position sensor, exhaust gas pressure sensor, intake manifold pressure/temperature sensor, and crankcase pressure sensor.
Shop talk notes: Verify the electronic control module (ECM) calibration is correct. If necessary, recalibrate the ECM. High voltage on the (+) 5-volt supply line can be caused by a short to battery voltage in the engine harness or connectors, or a failed ECM.
Official document details
| Brand | Cummins |
| Model coverage | Cummins ISM CM871 (2007-09); Cummins ISX CM871 (2007-09) |
| System / Group | Sensor Supply 2 Circuit — ISM CM871 fault codes |
| Fault code | 227 (SPN 3510, FMI 3/3) |
| Source | TruckFaultCodes.com Cummins fault code reference (© 2017) |
| Pages | 3 |
| File size | 0.1 MB |
| Format | |
| Language | English |
Document table of contents
- Fault code identification (PID, SPN, FMI, lamp)
- Description
- Shop Talk
- Component Location
- Troubleshooting Steps
Applicable truck models and engines
This document applies to Cummins ISM CM871 (2007-09); Cummins ISX CM871 (2007-09) equipped diesel engines that log Fault Code 227. Always confirm engine calibration and use a Cummins diagnostic tool such as INSITE to read live data before starting repairs. Full specifications are published on the Cummins official website.
Who needs this Cummins fault code 227 manual
Heavy-duty truck technicians, fleet workshops and owner-operators diagnosing an electronic control module warning on ISM CM871 engines will use this sheet to verify the fault before parts are replaced.
The full PDF is available in the DiagTechPro manuals library; a free account is required to download.
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