This 1-page C13 auxiliary output DTCs DTC document covers diagnostic trouble code 0055-06, titled “Auxiliary Output #07 current high,” for Caterpillar diesel engines. It provides the fault condition description, possible causes, and recommended troubleshooting steps for technicians diagnosing electrical current faults on auxiliary output circuits.
Official C13 auxiliary output DTCs DTC document details
| Brand | CAT (Caterpillar) |
| Model coverage | C11, C13, C15 (All Others) |
| System/Group | DTCs — Diagnostic Trouble Codes |
| Publication no. | 0055-06 |
| Year/Revision | Unknown |
| Pages | 1 |
| File size | 0.3 MB |
| Format | |
| Language | English |
Document table of contents
- DTC 0055-06 — Auxiliary Output #07 Current High
- Fault condition and code description
- Possible causes of high current on auxiliary output circuit
- Recommended diagnostic and repair procedure
Applicable truck models
This document applies to Caterpillar C11, C13, and C15 diesel engines grouped under the “All Others” classification. These engine families are widely used in Class 8 on-highway trucks and heavy-duty vocational applications. Code 0055-06 specifically addresses a high-current condition detected on Auxiliary Output #07, which may relate to aftertreatment components, fan clutch solenoids, or other ECM-controlled outputs depending on the engine application and wiring configuration. Technicians should cross-reference the specific vehicle wiring schematic to identify which device is connected to auxiliary output channel 07. For official Caterpillar parts lookup, technical bulletins, and service tool updates, visit Caterpillar Support and Service Resources.
Who needs this auxiliary output DTCs DTC manual
Diesel technicians and workshop owners troubleshooting a logged 0055-06 fault code on CAT C11, C13, or C15 engines will find this reference essential. It is particularly useful when diagnosing short-to-ground or excessive current draw conditions on ECM-controlled auxiliary circuits.
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Using this document effectively
Use C13 auxiliary output DTCs DTC — Diagnostic Code 0055-06 Current as a reference alongside the exact machine identification, engine family, control module, and publication revision shown on the equipment. Confirm that the model and production range match before following any table, connector view, test sequence, or specification. Record the original fault code and operating conditions before clearing codes or disconnecting components.
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