This Cummins code 1667 document is a troubleshooting PDF for Fault Code 1667 on ISB6.7 CM2150 aftertreatment systems. It explains the aftertreatment diesel oxidation catalyst inlet temperature sensor circuit, fault logic, diagnostic steps, inspection points, and clearing requirements for the amber CHECK ENGINE light.
Official Cummins code 1667 document details
| Brand | Cummins |
|---|---|
| Model coverage | ISB6.7 CM2150 (2007-09) |
| System/Group | DTCs; aftertreatment temperature sensors; aftertreatment diesel oxidation catalyst inlet temperature sensor |
| Publication no. | Not shown in extract |
| Year/Revision | Last Modified: 20-Jul-2010 and 15-Sep-2010; model year unknown |
| Pages | 17 |
| File size | 0.3 MB |
| Format | |
| Language | English |
Document table of contents
- Overview
- Circuit Description
- Component Location
- FAULT CODE 1667 – Aftertreatment Exhaust Gas Temperature 1 – Data Erratic, Intermittent, or Incorrect
- Conditions for Running the Diagnostics
- Conditions for Setting the Fault Codes
- Action Taken When the Fault Code is Active
- Conditions for Clearing the Fault Code
- Shop Talk
- Associated Procedures
- Troubleshooting Steps
- Guided Step 1 – Check for sensor circuit fault codes.
- Guided Step 2 – Check the aftertreatment diesel oxidation catalyst inlet temperature sensor and circuit.
- Guided Step 3 – Check the ECM and OEM harness.
- Guided Step 4 – Inspect the aftertreatment diesel oxidation catalyst.
- Guided Step 5 – Clear the fault code.
Applicable truck models
This PDF applies to Cummins ISB6.7 CM2150 engines listed under the 2007-09 DTC group. The extract also references related service manual procedures for ISB CM2150, Bulletin 4021578, and ISC and ISL CM2150, Bulletin 4021569, but the file information identifies the main coverage as ISB6.7 CM2150. Component location is OEM dependent, so the document directs technicians to the OEM service manual for the diesel oxidation catalyst inlet temperature sensor position. For manufacturer information, visit Cummins official website.
Who needs this Cummins code 1667 manual
Workshop technicians, fleet maintenance staff, and diesel diagnostic specialists need this manual when Fault Code 1667 is active and active aftertreatment diesel particulate filter regeneration is disabled. It is useful for checking INSITE™ fault data, connector pin condition, sensor circuit response, pin-to-pin shorts, pin-to-ground shorts, miswired OEM harness conditions, and diesel oxidation catalyst soot or cell wall damage.
The full PDF is available in the DiagTechPro manuals library, free account required to download.
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