rail pressure sensor open is the Detroit DD Series diagnostic trouble code for fuel rail pressure sensor circuit failed open, and this page documents its official fuel rail pressure sensor circuit troubleshooting sheet. The three-page sheet lists an always-enabled monitor, a 2-second duration and a 25% derate with MIL and CEL, then walks the open-circuit checks on the sensor and Motor Control Module (MCM) harness.
rail pressure sensor open document details
| Brand | Detroit |
| Model coverage | DD Series — DD13, DD15, DD16 |
| System / group | DD Series (EPA 2007-Current) / DTCs |
| SPN | 164 |
| FMI | 5 |
| Fault | Fuel Rail Pressure Sensor Circuit Failed Open |
| Emissions / revision | EPA07 — Copyright 2017 |
| Pages | 3 |
| File size | 0.3 MB |
| Format | |
| Language | English |
Document table of contents
- Description, monitor and engine derate
- Sensor disconnection and connector inspection
- Harness voltage measurement (pins 1 and 3)
- MCM 120-pin connector resistance checks
- Sensor or MCM replacement decision
Troubleshooting steps summarised
The fuel rail pressure sensor is disconnected and inspected, and with the ignition ON (key ON, engine OFF) the voltage between pins 1 and 3 is measured for 4.5 to 5.5 volts. The procedure isolates an open supply, signal or ground conductor by checking the wiring to pins 102, 58 and 78 of the MCM 120-pin connector, verifying resistance below 5 ohms, then re-testing before replacing the sensor or the MCM.
Applicable truck models covered
It covers Detroit DD Series engines (DD13, DD15 and DD16) built to EPA 2007 emissions with the MCM 120-pin fuel-system harness. For engine specifications and warranty coverage, refer to the official Demand Detroit service resources. These troubleshooting steps are cross-checked with the Detroit Diesel Diagnostic Link (DDDL) and the official Demand Detroit service resources.
Who needs this rail pressure sensor open guide
Technicians diagnosing an open sensor circuit, a broken supply or signal wire, or a corroded MCM pin on the fuel system use this sheet to find the break before replacing parts.
The full PDF is available in the DiagTechPro manuals library; a free account is required to download the complete step-by-step document.
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