This CAT 3406E injector fault troubleshooting document covers diagnostic trouble code 0003-11 (FMI 11), which flags a Cylinder #3 injector current fault on Caterpillar 3406E, C-10, and C-12 on-highway truck engines. The 2-page PDF details the conditions that generate the code, system response behavior, possible performance effects, and the required test procedure.
Official CAT 3406E injector fault document details
| Brand | Caterpillar (CAT) |
| Model coverage | 3406E, C-10, C-12 Truck Engines (serial prefixes 8YS, 9NS, 5DS, 1LW) |
| System / Group | Fuel Injection — SMCS 1290-038 — Diagnostic Trouble Codes |
| 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
- Conditions Which Generate This Code (PID 0003 FMI 11)
- System Response — ECM logging, snapshot trigger, check engine lamp behavior, Cylinder Cutout Test restriction
- Possible Performance Effect — engine misfires, low power
- Troubleshooting — Test Step 1: Injector Solenoid Circuit – Test
Applicable truck models
This publication 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 document also covers serial prefix groups 8YS, 5DS, and 1LW. These engines are widely installed in Class 8 trucks from multiple OEMs. For official Caterpillar parts and service information, visit Caterpillar Support.
Who needs this CAT 3406E injector fault manual
Diesel mechanics and workshop owners diagnosing a Cylinder #3 injector current fault on any 3406E, C-10, or C-12 engine need this document. It provides the ECM-level explanation of the open-circuit or short-circuit condition detected in the injector solenoid wiring, plus the single-step troubleshooting path to the Injector Solenoid Circuit test.
The Engine Control Module detects either a low current condition (open circuit) or a high current condition (short circuit) in the cylinder injector solenoid wiring after attempting to operate the injector. When this code is active, the ECM logs the diagnostic code, triggers a snapshot, and illuminates the check engine lamp. The automatic Cylinder Cutout Test is disabled. The affected injector may not operate, leading to engine misfires and low power. The prescribed troubleshooting action is to perform the Injector Solenoid Circuit – Test procedure; if that test returns OK, no further action is required.
The full PDF is available in the DiagTechPro manuals library, free account required to download.
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