This 1-page PDF is a C11 C13 C15 DTCs voltage low diagnostic trouble code reference covering fault code 0041-04, which addresses an 8 Volt supply voltage low condition on Caterpillar heavy-duty diesel engines. The document provides the fault code definition, conditions for setting the code, and recommended troubleshooting steps for technicians working on affected CAT powertrains.
Official C11 C13 C15 DTCs voltage low document details
| Brand | Caterpillar (CAT) |
| Model coverage | C11, C13, C15 (All Others) |
| System / Group | Diagnostic Trouble Codes (DTCs) |
| Publication no. | 0041-04 |
| Year / Revision | Unknown |
| Pages | 1 |
| File size | 0.3 MB |
| Format | |
| Language | English |
Document table of contents
- Fault code 0041-04: 8 Volt Supply Voltage Low
- Conditions for setting the DTC
- Diagnostic procedure and troubleshooting steps
- Electrical circuit inspection guidelines
Applicable truck models
This document applies to Caterpillar C11, C13, and C15 diesel engines classified under the “All Others” sub-group. These engines are commonly installed in a wide range of on-highway Class 8 trucks and vocational vehicles. The DTC 0041-04 relates specifically to the 8 Volt supply circuit, which feeds critical sensor networks on these engine platforms. Workshops servicing fleets powered by CAT C11, C13, or C15 engines will find this fault code sheet essential for diagnosing low-voltage supply faults that can affect engine sensor readings and overall performance. For further technical resources and service bulletins, visit Caterpillar’s official support page.
Who needs this C13 C15 DTCs voltage low manual
Diesel mechanics, fleet maintenance technicians, and independent workshop owners troubleshooting an 8 Volt supply voltage low condition on Caterpillar engines need this reference. It is especially useful when a diagnostic scan tool reports DTC 0041-04 and the technician requires the OEM-specified inspection and repair procedure.
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