This Cummins code 155 document is a 7-page troubleshooting manual for Fault Code 155 on CM2250 engines, focused on intake manifold air temperature above the critical protection limit. It explains the circuit, fault conditions, engine effects, INSITE™ checks, calibration review, and repair direction for the intake manifold pressure/temperature sensor.
Official Cummins code 155 document details
| Brand | Cummins |
|---|---|
| Model coverage | ISB6.7 CM2250, with associated CM2250 and other listed Cummins engine models |
| System/Group | ISB6.7 CM2250 (2010-12) / DTCs; Intake Manifold 1 Temperature Circuit |
| Publication no. | 4022254 listed for ISB6.7 CM2250 associated procedures |
| Year/Revision | Last Modified: 18-Jan-2011; overview section Last Modified: 11-Jun-2010 |
| Pages | 7 |
| File size | 0.2 MB |
| Format | |
| Language | English |
Document table of contents
- Overview
- Circuit Description
- Component Location
- FAULT CODE 155
- 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 – Monitor intake manfiold air temperature reading.
- Guided Step 2 – Check ECM calibration and clear fault codes.
- Guided Step 2B – Disable the fault code.
Applicable truck models
This file applies to Cummins ISB6.7 CM2250 fault diagnostics and also references ISX11.9 CM2250, ISC8.3 and ISL9 CM2250, ISX15 CM2250, GX CM2250, QSL9 CM2250, and QSB6.7 CM2250 in the associated procedures table. The same table also lists procedure references for ISF2.8 CM2220 E, ISF2.8 CM2220 AN, ISF3.8 CM2220, ISB4.5, ISB6.7, ISD4.5, ISD6.7 CM2150 SN, ISL8.9 CM2150 SN, ISM11 CM876 SN, and ISZ13 CM2150. Official manufacturer information is available from Cummins.
Who needs this Cummins code 155 manual
Workshop owners, diesel mechanics, and diagnostic technicians need this manual when a red STOP ENGINE lamp appears with Fault Code: 155, PID: P105, SPN: 105, and FMI: 0/0. It supports checks for restricted air flow through the charge-air cooler, an undersized charge-air cooler, high turbocharger compressor outlet temperature, sensor correlation, and ECM calibration status.
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