$1,395
+ $500 refundable core deposit (90-day return window). No-deposit option available at checkout: send your core first.
Usually ships within 10 business days, often sooner
2-year transferable warranty · Programmed to your truck at no charge · Core deposit refunded on return
Failed flash recovery available. Start a repair →
Prefer to fix your own unit?
Flat rebuild $745 (bench fee included) · 15 to 30 days on the bench — you keep your original ECM.
Start a repair instead →
Flat rebuild $745 (bench fee included) · 15 to 30 days on the bench — you keep your original ECM.
Start a repair instead →
| Engine serial prefix | 4CK |
| Brand | Caterpillar |
| Condition | Remanufactured |
| SKU | NL-CAT-3406E-4CK |
| Warranty | 2-year transferable warranty |
| ADEM generation | ADEM A4 (40-pin) |
| ECM P/N cross-reference | 9X8085-07 |
About the Caterpillar 3406E 4CK ECM
The 4CK is the ADEM A4, 40-pin engine control module for the Caterpillar 3406E. It is an on-highway truck ECM.
It replaces the OEM ECM part numbers 9X8085-07. Cat engine arrangement numbers: 4P9464, 4P9463, 6I3401, 4P9014, 6I3409, 4P9465, 1003648, 6I3441, 6I3411, 1038088.
We repair the 3406E 4CK ECM on the bench and supply tested remanufactured exchange units, programmed to your engine and ready to install. Send yours in for repair, or order an exchange unit and send your old one back as the core.
Remanufactured Caterpillar ECM for 3406E. Programmed to your engine arrangement and ECM family. Plug and play install. Standard programming included — usually ships within 10 business days, often sooner. 2-year warranty. Core exchange required. $500 core deposit refunded when your old ECM returns within 90 days.
Common Cat ECM failures we repair
Cat ADEM ECMs tend to fail the same few ways. We fix all of these on the bench, every day:
- Injector driver failure. A dead hole or misfire when the ECM stops driving an injector. We repair the driver circuit and bench-test every channel.
- Lost customer parameters. The settings programmed to your engine drop out. We recover and reload them.
- Runs, but no communication. The engine runs but won't talk to Cat ET. We get communication back so it can be read and programmed.
Repair instead of replace: Cat 3406E ECM repair →