Cummins fault code 1867 is the Cummins Engine Gas Recirculation Temperature – Data Erratic, Intermittent, or Incorrect document for the ISX11.9 CM2250 (2010-12) engine platform, a 12-page PDF that reproduces the official fault code write-up read with Cummins INSITE. The EGR temperature sensor is a variable-resistor sensor on the EGR connection tube after the EGR cooler, and the ECM reads its resistance to determine EGR gas temperature for engine protection and emissions control.
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 | 1867 — PID P412, SPN 412, FMI 2/2 |
| Warning lamp | Amber |
| Publication reference | Cummins troubleshooting bulletin 2883445 |
| Pages | 12 |
| File size | 0.2 MB |
| Format | |
| Language | English |
What Cummins fault code 1867 means
It sets when the EGR temperature reads too high or too low for the operating conditions, or does not change with the operating conditions. A default EGR temperature value is used, the EGR valve closes, and diesel exhaust fluid injection and both regenerations are disabled. 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 1867 manual
Heavy-duty diesel technicians, fleet maintenance teams and workshop owners diagnosing an erratic EGR temperature signal use this reference to read SPN 412 / FMI 2/2 correctly and to follow the guided steps in INSITE. The possible causes it lists include:
- an EGR temperature signal open or short
- a reading that does not track engine conditions
- a failed EGR temperature sensor
The full 12-page PDF for EGR temperature sensor fault code 1867 is available in the DiagTechPro manuals library; a free account is required to download.
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