This Cummins Code 124 Troubleshooting document covers DTC 124 for intake manifold pressure on the Cummins ISB6.7 CM2150 diagnostic group. It explains the circuit description, fault reason, possible causes, sensor accuracy checks, tampering inspection, and fault-code clearing steps using INSITE™ electronic service tool.
Official Cummins Code 124 Troubleshooting document details
| Brand | Cummins |
|---|---|
| Model coverage | ISB6.7 CM2150 (2007-09) |
| System/Group | DTCs; Intake Manifold Pressure/Temperature Circuit |
| Publication no. | Not shown in extract |
| Year/Revision | Last Modified: 20-Jul-2010 |
| Pages | 6 |
| File size | 0.2 MB |
| Format | |
| Language | English |
Document table of contents
- Overview
- Circuit Description
- Component Location
- Shop Talk
- FAULT CODE 124 (QSB3.3)
- Intake Manifold Pressure/Temperature Circuit
- Possible causes
- Associated Procedures
- Troubleshooting Steps
- Guided Step 1 – Check the sensor accuracy.
- Guided Step 1A – Verify the sensor accuracy with INSITE™ electronic service tool.
- Guided Step 1B – Verify the sensor accuracy with a mechanical gauge.
- Guided Step 1C – Check the system for tampering.
- Guided Step 2 – Clear the fault code.
- Guided Step 2A – Disable the fault code.
- Guided Step 2B – Clear the inactive fault codes.
Applicable truck models
This file applies to Cummins ISB6.7 CM2150 (2007-09) engines in the DTCs group and references Fault Code 124, PID P102, and FMI 0/16. The extract also labels the fault as FAULT CODE 124 (QSB3.3), with the intake manifold pressure sensor monitored by the electronic control module and the amber lamp associated with engine power derate. For official manufacturer information, visit Cummins.
Who needs this Code 124 Troubleshooting manual
Mechanics and workshop owners need this file when diagnosing intake manifold pressure above the maximum limit for the engine rating. It is useful when checking a suspect intake manifold pressure sensor, comparing INSITE readings to a mechanical gauge, inspecting wastegate or fuel-system tampering, or clearing inactive fault codes after repair.
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