This document is a CAT 0174-03 fuel temperature troubleshooting guide covering diagnostic code 0174-03 (Fuel Temperature voltage high) for Caterpillar 3406E, C-10, and C-12 on-highway truck engines. It defines the conditions that generate the code, the system response, and the step-by-step test procedure to resolve the fault.
Official CAT 0174-03 fuel temperature document details
| Brand | Caterpillar (CAT) |
| Model coverage | 3406E, C-10, C-12 Truck Engines (8YS, 9NS, 5DS, 1LW prefix groups) |
| System / Group | Fuel Temperature Sensor — Diagnostic Trouble Codes (DTCs), SMCS 1922-038 |
| Publication no. | RENR1328-08 |
| Year / Revision | Published 01/10/2008, updated 16/10/2008 |
| Pages | 1 |
| File size | 0.1 MB |
| Format | |
| Language | English |
Document table of contents
- Conditions Which Generate This Code — signal voltage from fuel temperature sensor greater than 4.95 VDC for more than eight seconds
- System Response — fuel temperature default to 30 °C (86 °F), fuel rate power correction disabled while code is active
- Caterpillar Electronic Technician (Cat ET) indicator behavior and “DIAG” status screen display
- Low power symptom explanation due to loss of fuel temperature power correction
- Test Step 1 — Engine Temperature Sensor Open or Short Circuit test procedure and results
Applicable truck models
This troubleshooting document applies to Caterpillar on-highway truck engines in the 3406E, C-10, and C-12 families. The specific configuration referenced is the C-12 Truck Engine 9NS00001-UP, but the procedure also covers serial prefix groups 8YS, 5DS, and 1LW. The Engine Control Module (ECM) monitors the fuel temperature sensor signal voltage, and this guide addresses the high-voltage fault condition across all listed configurations. For official Caterpillar parts lookup and additional technical resources, visit Caterpillar Support.
Who needs this 0174-03 fuel temperature manual
Fleet mechanics and independent workshop owners diagnosing active DTC 0174-03 on 3406E, C-10, or C-12 engines need this reference. It is essential for anyone using Cat ET who encounters a fuel temperature voltage high fault and needs the correct sensor test procedure.
The full PDF is available in the DiagTechPro manuals library; a free account is required to download.
Related manuals library
Sản phẩm liên quan cho hãng này
Cùng brand theo taxonomy hiện có trong catalog WooCommerce.
CAT Perkins Pack – Premium Power & Performance by Caterpillar
CAT SIS
