This 1-page CAT diagnostic document addresses the CAT C13 auxiliary output DTC code 0054-05, which indicates a current low condition on Auxiliary Output #06. It is part of the Caterpillar diagnostic trouble code (DTC) library for C11, C13, and C15 engine platforms and provides technicians with the information needed to identify and resolve this specific fault.
Official CAT C13 auxiliary output DTC document details
| Brand | Caterpillar (CAT) |
| Model coverage | C11, C13, C15 (All Others) |
| System / Group | DTCs — Auxiliary Output #06 Current Low |
| Publication no. | 0054-05 |
| Year / Revision | Unknown |
| Pages | 1 |
| File size | 0.3 MB |
| Format | |
| Language | English |
Document table of contents
- DTC 0054-05 — Auxiliary Output #06 Current Low
- Fault description and conditions
- Diagnostic steps and troubleshooting procedure
Applicable truck models
This diagnostic reference applies to Caterpillar C11, C13, and C15 diesel engines grouped under the “All Others” classification. These engine families are widely installed in on-highway Class 8 trucks and vocational applications from multiple OEMs. Workshops servicing any vehicle equipped with a CAT C11, C13, or C15 engine that triggers DTC 0054-05 will find this document relevant. For additional technical resources and parts information, visit Caterpillar’s official support page.
Who needs this C13 auxiliary output DTC manual
Diesel technicians and workshop owners troubleshooting a current low fault on Auxiliary Output #06 in Caterpillar C11, C13, or C15 engines should consult this guide. It is especially useful when a diagnostic scanner reports code 0054-05 and the technician needs the factory-recommended procedure to isolate the circuit issue.
The full PDF is available in the DiagTechPro manuals library; a free account is required to download.
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