This document is a CAT Idle Shutdown Override troubleshooting guide covering diagnostic code PID 0071 FMI 00 for Caterpillar 3406E, C-10, and C-12 on-highway truck engines. It explains the conditions that generate the code, system response behavior, and the recommended test procedure to resolve the fault. Published by Caterpillar under media number RENR1328-08, this 2-page PDF is a focused reference for clearing idle shutdown override events.
Official CAT Idle Shutdown Override document details
| Brand | Caterpillar (CAT) |
| Model coverage | 3406E, C-10, C-12 Truck Engines (8YS, 9NS, 5DS, 1LW prefix configurations) |
| System / Group | DTCs — SMCS 1901-038 (Engine Electronic Control System) |
| Publication no. | RENR1328-08 |
| Year / Revision | Published 01/10/2008, updated 16/10/2008 |
| Pages | 2 |
| File size | 0.1 MB |
| Format | |
| Language | English |
Document table of contents
- 0071-00 Idle Shutdown Override (01) — PID 0071 FMI 00
- Conditions Which Generate This Code
- System Response
- Possible Performance Effect
- Troubleshooting: Test Step 1 — Idle Shutdown Timer – Test
Applicable truck models
This troubleshooting procedure applies to Caterpillar on-highway truck engines in three families: the 3406E, C-10, and C-12. The specific configuration referenced is the C-12 Truck Engine 9NS00001-UP, but the guide also covers serial prefix groups 8YS, 5DS, and 1LW. These engines are installed in Class 8 heavy-duty trucks from multiple OEMs. The Engine Control Module (ECM) monitors the “Allow Idle Shutdown Override” parameter, the brake switch, clutch switch, and outside temperature sensor inputs. When the idle shutdown timer enters its final 90 seconds and override conditions are met, the ECM stops the countdown and displays “OVERRIDE” in Caterpillar Electronic Technician (ET). The idle shutdown timer will not resume until the vehicle is moved and the accelerator pedal is depressed. Customer passwords are required to clear this diagnostic code. For additional technical resources, visit Caterpillar’s official support page.
Who needs this CAT Idle Shutdown Override manual
Fleet mechanics, independent diesel technicians, and workshop owners servicing Caterpillar 3406E, C-10, or C-12 powered trucks will use this guide when DTC PID 0071 FMI 00 appears during diagnostics. It is essential for anyone using Caterpillar Electronic Technician (ET) software to interpret idle shutdown override status and perform the referenced “Idle Shutdown Timer – Test” procedure.
The full PDF is available in the DiagTechPro manuals library, free account required to download.
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