This 2-page diagnostic document covers the manifold temperature DTCs trouble code 0105-04, addressing an intake manifold air temperature sensor voltage low condition (fault code 38) on Caterpillar heavy-duty diesel engines. It provides the diagnostic steps and electrical checks needed to resolve this specific fault in the engine management system.
Official manifold temperature DTCs document details
| Brand | Caterpillar (CAT) |
| Model coverage | C11, C13, C15 (All Others) |
| System / Group | Diagnostic Trouble Codes (DTCs) |
| Publication no. | 0105-04 |
| Year / Revision | Unknown |
| Pages | 2 |
| File size | 0.1 MB |
| Format | PDF (compressed) |
| Language | English |
Document table of contents
- 0105-04 Intake Manifold Air Temperature Voltage Low — Fault Code 38, Page 1
- 0105-04 Intake Manifold Air Temperature Voltage Low — Fault Code 38, Page 2 (continued diagnostics)
Applicable truck models
This diagnostic reference applies to Caterpillar C11, C13, and C15 diesel engines classified under the “All Others” group. These powertrains are widely installed in Class 8 on-highway trucks, vocational vehicles, and select off-highway equipment. The fault code 38 — intake manifold air temperature sensor voltage low — is relevant whenever the ECM detects that the signal from the intake manifold air temperature sensor has dropped below the expected operating range. Technicians working on any chassis equipped with one of these three CAT engine platforms should consult this document when DTC 0105-04 is active or logged. For additional Caterpillar service literature and parts information, visit Caterpillar Official Support.
Who needs this manifold temperature DTCs manual
Diesel mechanics and workshop owners troubleshooting a voltage low condition on the intake manifold air temperature circuit of CAT C11, C13, or C15 engines will find this guide essential. Fleet maintenance teams responsible for clearing active DTCs and verifying sensor wiring integrity should keep this reference on hand.
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