The Detroit delta pressure sensor fault-code sheet is a Detroit DD Series (EPA 2007-Current) troubleshooting document for a delta pressure sensor circuit that reads high on the DD Series. It reproduces the official fault identification, the monitored parameters or service notes printed on the document, and the recommended diagnostic actions a heavy-duty technician follows step by step.
Detroit delta pressure sensor document details
| Brand | Detroit |
| Model coverage | Detroit DD13, DD15 and DD16 diesel engines built from EPA 2007 onward; the same DTC logic is cross-referenced on Series 60 DDEC VI applications. |
| System / Group | DD Series (EPA 2007-Current) / DTCs |
| Publication no. | Not printed on document; sourced from Detroit Power Service Literature |
| Year / Revision | © 2017 |
| Pages | 2 |
| File size | 0.2 MB |
| Format | |
| Language | English |
Document table of contents
- Fault code identification — SPN 411 / FMI 3
- Description and monitored parameter
- Pin 109 voltage check
- Venturi port cleaning
- Ground-circuit resistance to MCM2 pin 103
- Sensor replacement and verification
Applicable truck models
Detroit DD13, DD15 and DD16 diesel engines built from EPA 2007 onward; the same DTC logic is cross-referenced on Series 60 DDEC VI applications. Fault code SPN 411 / FMI 3 is diagnosed with a diesel diagnostic tool such as DDDL or DDRS. For factory procedures and the latest module software, see the Detroit Diesel official website.
Diagnostic steps and checks
The sheet identifies the EGR delta P sensor circuit as high — always enabled, two-second duration, 25% derate, with the MIL and CEL lit. The technician uses the Voltages tab to read delta P voltage on pin 109, cleans the venturi pipe ports, checks the harness for bent, rusted or corroded pins, confirms 0 volts with the sensor unplugged, and measures the pin 2 ground circuit; an open ground is repaired to MCM2 pin 103, otherwise the sensor is replaced and the repair verified per Detroit Power Service Literature.
Who needs this Detroit delta pressure sensor manual
This troubleshooting sheet suits Detroit-certified technicians and independent heavy-duty workshops that read SPN 411/FMI 3 on a scan tool and want the factory decision tree, pin references and component checks before replacing parts.
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