Cummins ISM Code 212 documents the Oil Temperature Sensor Circuit High diagnostic and troubleshooting procedure for the Cummins ISM CM570 (1999-02) engine platform. This 5-page fault code sheet from TruckFaultCodes.com (Copyright 2017) covers fault code 212 (PID P175, SPN 175, FMI 3/3, YELLOW lamp) and the checks used to confirm and clear it.
Official document details
| Brand | Cummins |
|---|---|
| Model coverage | ISM CM570, ISX CM570, Signature CM570 (1999-02) |
| System / Group | Diagnostic Trouble Codes (DTCs) |
| Fault code | 212 — PID P175, SPN 175, FMI 3/3 |
| Warning lamp | YELLOW |
| Pages | 5 |
| File size | 0.3 MB |
| Format | |
| Language | English |
Document table of contents
- Circuit description
- Component location
- Shop talk
- Troubleshooting steps
- Fault code verification and clearing
Cummins ISM Code 212 diagnostic steps
The oil pressure/temperature sensor lets the ECM monitor engine oil temperature; excessive temperature with engine protection enabled can cause a derate or shutdown. The sensor sits on the engine block to the left of the fuel filter, behind the air compressor. Technicians compare sensor resistance to the temperature table (for example 9k to 11k ohms at 25 degrees C), inspect the connector pins, and check the signal circuit for shorts and open circuits before the code is cleared.
Applicable truck models
This sheet applies to Cummins ISM CM570, ISX CM570, and Signature CM570 (1999-02) engines built around the CM570 ECM and the oil temperature sensor. The oil pressure/temperature sensor is on the engine block, left of the fuel filter, behind the air compressor. The document is laid out with a circuit description, a component location note, shop-talk tips, and a step-by-step troubleshooting chart whose go-to branches route the technician through each measurement. Refer to the official Cummins engine support site for wiring diagrams and component part numbers.
Who needs this Cummins ISM Code 212 manual
Heavy-duty diesel technicians, fleet service teams, and owner-operators diagnosing a yellow-lamp oil temperature sensor fault will use this sheet to follow the factory decision tree, confirm the reading, and repair the harness, connector, or component instead of replacing parts on guesswork. It spells out each measurement threshold and its pass or fail branch, so the fault can be verified active, the repair validated, and the inactive code cleared with the diagnostic tool.
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