This 2-page troubleshooting guide addresses the C15 intake manifold DTCs temperature diagnostic code 0105-11, which flags excessively high air temperature inside the intake manifold. The document details the exact conditions that trigger the code, the system response from the Engine Control Module (ECM), and a step-by-step repair procedure covering coolant level and aftercooler inspection.
Official C15 intake manifold DTCs temperature document details
| Brand | Caterpillar (CAT) |
| Model coverage | C15 Truck Engine MXS (C15 On-Highway Truck MXS00001-UP) |
| System / Group | Diagnostic Trouble Codes (DTCs) — SMCS 1439-038-AI; 1921-038 |
| Publication no. | RENR5088-10 |
| Year / Revision | Published 01/02/2009, Updated 25/02/2009 |
| Pages | 2 |
| File size | 0.1 MB |
| Format | |
| Language | English |
Document table of contents
- 0105-11 Very High Intake Manifold Air Temperature (64) — Conditions Which Generate This Code
- System Response — ECM behavior, warning lamp and check engine lamp activation
- Test Step 1: Check the Coolant Level
- Test Step 2: Check the Aftercooler
Applicable truck models
This troubleshooting procedure applies to the Caterpillar C15 on-highway truck engine, specifically the MXS serial number prefix (configuration MXS00001-UP). The C15 is widely installed in Class 8 heavy-duty trucks. The document covers DTC 0105-11, which triggers when the intake manifold air temperature exceeds 110 °C (230.0 °F) for more than two seconds while the engine has been running for at least 30 seconds and coolant temperature is above 99 °C (210.0 °F). The diagnostic procedure checks engine coolant level — since engine coolant cools intake air after the turbochargers and before the air-to-air aftercooler — and inspects the aftercooler for debris or airflow restriction. Heavy loads combined with high ambient air temperatures are noted as potential causes. Customer passwords are required to clear this code via Caterpillar Electronic Technician (ET). For official parts and service resources, visit Caterpillar Support.
Who needs this C15 intake manifold DTCs temperature manual
Mechanics and workshop owners servicing Caterpillar C15 on-highway engines will need this guide when diagnosing a 0105-11 fault code. It is essential for anyone troubleshooting overheating conditions in the intake manifold or aftercooler system on MXS-prefix C15 engines.
The full PDF of this intake manifold DTCs temperature troubleshooting document is available in the DiagTechPro manuals library. A free account is required to download.
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