This 2-page PDF is a CAT low coolant warning diagnostic reference covering DTC 0111-01 (Low Coolant Level Warning 62) for Caterpillar diesel engines. It provides fault code identification and diagnostic direction for technicians troubleshooting coolant-level alert conditions in CAT-powered trucks.
Official CAT low coolant warning document details
| Brand | Caterpillar (CAT) |
| Model coverage | C11, C13, C15 (All Others) |
| System / Group | Diagnostic Trouble Codes (DTCs) — Cooling System |
| Publication no. | 0111-01 Low Coolant Level Warning 62 |
| Year / Revision | Not specified |
| Pages | 2 |
| File size | 0.1 MB |
| Format | PDF (compressed) |
| Language | English |
Document table of contents
- 54 – 0111-01 Low Coolant Level Warning 62-1 (Page 1 of 2)
- 54 – 0111-01 Low Coolant Level Warning 62-2 (Page 2 of 2)
Applicable truck models
This document applies to Caterpillar C11, C13, and C15 diesel engines classified under the “All Others” sub-group. These engines are widely installed in Class 8 on-highway trucks and vocational vehicles from manufacturers such as Peterbilt, Kenworth, and Western Star. The DTC 0111-01 relates specifically to the low coolant level warning circuit (parameter 62), which monitors the coolant level sensor and triggers an alert when coolant drops below the acceptable threshold. Technicians working on any platform equipped with these CAT engine families should reference this bulletin when the 0111-01 code is active or logged. For additional technical resources and service tool information, visit the Caterpillar official support page.
Who needs this low coolant warning manual
Fleet maintenance technicians, independent diesel mechanics, and workshop owners servicing Caterpillar-powered trucks will find this document essential when diagnosing a low coolant level warning fault. It is particularly useful during troubleshooting of the coolant level sensor circuit, ECM parameter 62, and related wiring on C11, C13, and C15 engines.
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