The Cummins ISM code 419 manual is a 2-page diagnostic PDF for the intake manifold pressure sensor on the ISM CM570 (1999–2002) engine. It covers the intake manifold pressure sensor in the air intake manifold, whose reading the electronic control module (ECM) compares with two other pressure sensors at key-on.
Cummins ISM code 419 document details
| Brand | Cummins |
| Model coverage | ISM CM570 (1999–2002) |
| System / group | Intake manifold pressure sensor — DTCs |
| DTC number | 419 |
| PID / SPN | P102 / 1319 |
| 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 419 manual
The document places the sensor toward the front of the engine in the air intake manifold and explains that at key-on the ECM compares ambient pressure from the ambient air pressure sensor, the intake manifold pressure sensor and the oil pressure sensor, setting this fault when the intake reading disagrees with the other two. The steps require Code 115 to be inactive, oil temperature above 4°C [40°F], and a re-key to confirm before the sensor is replaced.
This guide suits diesel technicians and workshop owners who face a rationality fault on the intake manifold pressure sensor and want to confirm the reading against related sensors first. It reads as fault code 419 troubleshooting steps for the intake manifold 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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