The Cummins ISM code 435 manual is a 2-page diagnostic PDF for the oil pressure sensor on the ISM CM570 (1999–2002) engine. It covers the oil pressure/temperature sensor on the engine block, which the electronic control module (ECM) cross-checks against two other pressure readings at key-on.
Cummins ISM code 435 document details
| Brand | Cummins |
| Model coverage | ISM CM570 (1999–2002) |
| System / group | Oil pressure sensor — DTCs |
| DTC number | 435 |
| PID / SPN | P100 / 100 |
| FMI | 2 |
| Warning lamp | YELLOW |
| Pages | 2 |
| File format | |
| Language | English |
Document table of contents
- Component location
- Shop talk and key-on pressure comparison
- Code 115 pre-check
- Sensor rationality verification
Applicable truck models
This procedure applies to the ISM CM570 (1999–2002) engine and the shared CM570 fuel-system platform found in on-highway trucks. The same fault-code logic is carried across related CM570 engine families of that era. For engine identification and factory service references, see the manufacturer at the Cummins official website.
Who needs this Cummins ISM code 435 manual
The document locates the sensor on the block to the left of the fuel filter, behind the air compressor. At key-on the ECM compares ambient pressure from the ambient air pressure sensor, the intake manifold pressure sensor, and the oil pressure sensor, and sets this fault when the oil reading disagrees with the other two. The steps first confirm Code 115 is inactive, require oil temperature above 4°C [40°F], and then re-key to see whether the fault clears before the sensor is replaced.
This guide suits diesel technicians and workshop owners who face a rationality fault between the oil, ambient and intake sensors and want to rule out related codes before replacing parts. It reads as fault code 435 troubleshooting steps for the oil pressure sensor, keeping the diagnosis ordered and evidence-based.
The full PDF is available in the DiagTechPro manuals library, where a free account is required to download it.
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