This 8-page Caterpillar service document provides the complete CAT 3406E oil pressure diagnostic procedure for fault code 0100-11 Very Low Oil Pressure (46). It covers the 3406E, C-10, and C-12 on-highway truck engines and walks technicians through a structured nine-step troubleshooting sequence to identify and resolve low engine oil pressure conditions detected by the ECM.
Official CAT 3406E oil pressure document details
| Brand | Caterpillar (CAT) |
| Model coverage | 3406E, C-10, C-12 Truck Engines (8YS, 9NS, 5DS, 1LW prefixes) |
| System / Group | Engine Oil Pressure — Diagnostic Trouble Code 0100-11 |
| Publication no. | RENR1328-08 |
| Year / Revision | Published 01/10/2008, updated 16/10/2008 |
| Pages | 8 |
| File size | 0.1 MB |
| Format | |
| Language | English |
Document table of contents
- Conditions Which Generate This Code — ECM detection criteria and trip line maps
- System Response — Cat ET display messages, check engine lamp, warning lamp, speed and torque limitations, shutdown behavior
- Test Step 1: Check the Engine Oil Level
- Test Step 2: Verify Proper Sensor Installation
- Test Step 3: Check for Active Diagnostic Codes (barometric and boost pressure sensors)
- Test Step 4: Check the Status Screen — Boost Pressure and Engine Oil Pressure via Cat ET
- Test Step 5: Check the Supply Voltage to the Pressure Sensors (5.0 ± 0.16 VDC)
- Test Step 6: Install a Pressure Gauge — 1U-5470 Engine Pressure Group comparison
- Test Step 7: Compare the Readings to the Oil Pressure Map
- Test Step 8: Check the Supply Voltage to the Boost Pressure Sensor
- Test Step 9: Check the Supply Voltage to the Engine Oil Pressure Sensor
Applicable truck models
This procedure applies to Caterpillar 3406E, C-10, and C-12 on-highway truck engines with serial prefix configurations 8YS, 9NS, 5DS, and 1LW. The document specifically references the C-12 Truck Engine 9NS00001-UP configuration. When the ECM triggers code 0100-11, the engine speed is limited to 1350 RPM and vehicle speed to 72 km/h (45 mph); if Engine Monitoring is set to Shutdown, the engine shuts down after 30 seconds. These engines are found in Class 8 highway trucks across multiple OEM chassis. For additional Caterpillar technical resources, visit Caterpillar Support.
Who needs this CAT 3406E oil pressure manual
Fleet mechanics, independent diesel technicians, and workshop owners servicing Caterpillar-powered trucks will use this document whenever a 0100-11 Very Low Oil Pressure fault code appears. It is essential for anyone diagnosing sensor wiring faults, verifying 5-volt supply circuits, or confirming mechanical oil pressure problems using the 1U-5470 Engine Pressure Group and Cat ET.
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