This single-page document is a coolant level voltage DTCs diagnostic reference covering DTC 0111-04 (Coolant Level Voltage Low) for Caterpillar diesel engines. It provides the fault code definition, conditions for setting the code, and the recommended troubleshooting procedure for mechanics working on affected CAT equipment.
Official coolant level voltage DTCs document details
| Brand | Caterpillar (CAT) |
| Model coverage | C11, C13, C15 (All Others) |
| System/Group | Diagnostic Trouble Codes (DTCs) |
| Publication no. | 0111-04 |
| Year/Revision | Unknown |
| Pages | 1 |
| File size | 0.3 MB |
| Format | PDF (compressed) |
| Language | English |
Document table of contents
- DTC 0111-04 — Coolant Level Voltage Low
- Conditions for setting the diagnostic code
- Circuit description and sensor reference
- Troubleshooting and voltage verification steps
Applicable truck models
This document applies to Caterpillar C11, C13, and C15 diesel engines grouped under the “All Others” classification. These engines are widely installed in on-highway Class 8 trucks and vocational vehicles from multiple OEMs. The DTC 0111-04 procedure addresses the coolant level sensor circuit specifically when the ECM detects a voltage-low condition. Technicians servicing any chassis equipped with these CAT engine platforms should consult this reference when the fault is active or logged. For additional technical resources and service information, visit Caterpillar’s official support page.
Who needs this level voltage DTCs manual
Heavy-duty diesel mechanics, fleet maintenance technicians, and independent workshop owners diagnosing low-voltage faults on the coolant level sensor circuit in CAT C11, C13, or C15 engines will benefit from this guide. It is also useful for anyone using CAT ET or other diagnostic readers to resolve active or logged 0111-04 codes efficiently.
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