Cummins fault code 1885 is the Cummins Aftertreatment Intake NOx Sensor Circuit – Voltage Below Normal or Shorted to Low Source document for the ISX11.9 CM2250 (2010-12) engine platform, a 7-page PDF that reproduces the official fault code write-up read with Cummins INSITE. The aftertreatment intake NOx sensor is a smart device on the J1939 data link that measures engine-out NOx; the sensor and its NOx control module are serviced as one component near the turbocharger turbine outlet.
Official document details
| Brand | Cummins |
| Model coverage | Cummins ISX11.9, ISX15, ISB6.7, ISC8.3 and ISL9 CM2250 |
| System / group | ISX11.9 CM2250 (2010-12) / DTCs |
| Fault code | 1885 — PID P102, SPN 3216, FMI 4 |
| Warning lamp | Amber |
| Publication reference | Cummins troubleshooting bulletin 2883445 (aftertreatment intake NOx sensor circuit) |
| Pages | 7 |
| File size | 0.2 MB |
| Format | |
| Language | English |
What Cummins fault code 1885 means
It sets when the sensor reports an internal circuit error while exhaust gas temperature is above 150 C [302 F] and the engine is running. Intake NOx sensor operation is disabled, engine torque is reduced, and after extended operation road speed is limited to 8 km/h [5 mph]. The document walks a technician through the summary and the guided troubleshooting steps needed to confirm and clear the code.
Document table of contents
- Overview and circuit description
- Component location
- Conditions for running the diagnostics
- Conditions for setting the fault code
- Action taken when the fault code is active
- Conditions for clearing the fault code
- Shop Talk and possible causes
- Associated procedures and guided troubleshooting steps
Applicable truck models
This troubleshooting document covers Cummins ISX11.9, ISX15, ISB6.7, ISC8.3 and ISL9 CM2250 engines in Class 6 to 8 trucks. It is filed under the ISX11.9 CM2250 (2010-12) / DTCs group and also applies to ISX12 CM2250 installations, so confirm the engine dataplate before ordering parts. Cross-reference the calibration revision with Cummins official engine support before clearing the code.
Who needs this Cummins fault code 1885 manual
Heavy-duty diesel technicians, fleet maintenance teams and workshop owners diagnosing a low-voltage intake NOx sensor circuit use this reference to read SPN 3216 / FMI 4 correctly and to follow the guided steps in INSITE. The possible causes it lists include:
- a malfunctioning or damaged intake NOx sensor
- a failed internal sensor heater
- an incorrect NOx sensor part number
The full 7-page PDF for intake NOx sensor fault code 1885 is available in the DiagTechPro manuals library; a free account is required to download.
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