This 3-page PDF is a low coolant warning DTCs diagnostic reference covering DTC 0111-14 for Caterpillar C11, C13, and C15 diesel engines. It provides fault code definitions, diagnostic steps, and coolant level sensor circuit troubleshooting procedures for technicians working on CAT-powered trucks and equipment.
Official low coolant warning DTCs document details
| Brand | Caterpillar (CAT) |
| Model coverage | C11, C13, C15 (All Others) |
| System / Group | Diagnostic Trouble Codes (DTCs) — Coolant Level Monitoring |
| Publication no. | 0111-14 |
| Year / Revision | Not specified |
| Pages | 3 |
| File size | 0.1 MB |
| Format | |
| Language | English |
Document table of contents
- 0111-14 Low Coolant Level Warning — Page 1: Fault code description and conditions for activation
- 0111-14 Low Coolant Level Warning — Page 2: Diagnostic procedures and coolant level sensor circuit checks
- 0111-14 Low Coolant Level Warning — Page 3: Recommended actions, wiring verification, and clearing the DTC
Applicable truck models
This document applies to Caterpillar C11, C13, and C15 diesel engines classified under the “All Others” grouping. These engines are commonly installed in heavy-duty on-highway trucks such as the Kenworth T800, Peterbilt 379 and 389, and various vocational and off-highway machines. The DTC 0111-14 fault code targets the coolant level sensor and its associated warning circuit across all ECM configurations for these engine families. For official Caterpillar parts lookup and additional service literature, visit Caterpillar Support and Service Resources.
Who needs this coolant warning DTCs manual
Diesel mechanics, fleet maintenance technicians, and workshop owners troubleshooting a low coolant level warning on CAT C11, C13, or C15 engines will benefit from this guide. It is essential for anyone diagnosing DTC 0111-14 to verify sensor operation, inspect wiring harnesses, and confirm proper coolant levels before returning the vehicle to service.
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