CAT Engine 2682 Fault Code: Programmed Parameter Fault : Erratic, Intermittent, or Incorrect

What does CAT Engine error code 2682 mean?

CAT code 2682, SPN 630 FMI 2, is a programmed parameter fault. The ECM checks a set of configuration parameters that control how the engine runs, including fuel limiter settings (FLS) or fuel trim settings (FTS), injector trim codes, the engine serial number, and injector trim files. If any of these are missing, not fully loaded, or incorrectly programmed, the ECM sets this code.

This is different from a sensor or wiring failure. It is a software/configuration issue inside the ECM itself. Because these parameters directly affect fueling and injector control, an incomplete or wrong configuration can change how much fuel is delivered and how clean the engine runs, which is why engine performance and emissions are both affected.

On some versions, the fault is described as not being logged at all, meaning it only shows as an active condition on the electronic service tool's 'Active Diagnostics' screen rather than being stored in fault history. On another version, the code is described as active only, with the ECM possibly falling back to a default torque map or limiting the engine to low idle.

Common causes of 2682

• One or more configuration parameters are not programmed into the ECM. The effect depends on which specific parameter is missing.
• FLS (fuel limiter settings) or FTS (fuel trim settings) are missing or incorrect.
• Injector trim codes are missing, incomplete, or incorrect.
• The engine serial number is not programmed correctly into the ECM.
• Not all of the injector trim files have been loaded into the ECM, which affects engine performance and emissions.
• One or more programmable parameters have simply never been programmed at all, on some ECM software versions.

How to troubleshoot CAT Engine 2682: first checks

1. 1 Connect an electronic service tool (such as Caterpillar Electronic Technician) and open the 'Active Diagnostics' screen to see the full list of unresolved configuration conditions the ECM is flagging.
2. 2Verify that the engine serial number programmed in the ECM matches the physical engine serial number on the engine tag.
3. 3Check that FLS/FTS values are programmed and match the engine's rating and application.
4. 4Confirm that all injector trim codes are entered correctly for each cylinder and that all injector trim files have been fully loaded into the ECM.
5. 5Look for any recent ECM replacement, reflash, or component swap (such as injector replacement) that may have left parameters unprogrammed or mismatched.
6. 6Check whether the engine is currently limited to low idle or running on a default torque map, which points to the ECM having already responded to the missing configuration.

How the code clears

No separate clearing step is listed beyond correcting the parameters. Use the electronic service tool to program or correct whichever parameters are missing or incorrect, including FLS/FTS, injector trim codes, engine serial number, and injector trim files. Once all required parameters are properly programmed and loaded, the condition should no longer appear on the Active Diagnostics screen. On the version where the fault is described as active only, it should clear once the parameters are corrected, since no stored fault log is being kept for this code on that version.

Affected models and serial ranges

2682 appears in our records across 3 CAT Engine models. Match your machine by model and serial number.