The Detroit EGR sensor circuit fault-code sheet is a Detroit DD Series (EPA 2007-Current) troubleshooting document for an exhaust gas recirculation sensor circuit that reads high. 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 EGR sensor circuit 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
- Voltages-tab check on pin 109
- Venturi pipe delta P port cleaning
- Harness and ground-circuit resistance checks
- Sensor replacement and re-calibration
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
This two-page sheet flags the EGR delta P sensor circuit as reading high — always enabled, with a two-second typical duration, a 25% derate, and the MIL and CEL lit. Diagnosis reads delta P voltage on pin 109 from the diesel diagnostic tool Voltages tab, cleans the venturi pipe delta P ports, inspects the harness connector for bent or corroded pins, confirms 0 volts with the sensor disconnected, and measures the pin 2 ground-circuit resistance to MCM2 pin 103 before replacing the sensor and running the delta P re-calibration routine from Detroit Power Service Literature.
Who needs this Detroit EGR sensor circuit 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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