CAT 3406E (Prefix 5DS or 1LW) Fault Code: 02 PID: 244 SPN: FMI: 2 Event Recorder Data Lost
The ECM detects the following conditions:
•The unswitched battery connection has been disconnected from the ECM.
Probable Causes:
1) ECM Connection/harness
2) Battery voltage at ECM
3) Truck battery or battery cable issue
4) Aftermarket engine protection switch
5) ECM Failure
![Magic Tuner [paccar, Maxxforce, Detroit, Caterpillar, Delete]](https://www.ecuforcetruck.com/wp-content/uploads/2021/10/1-300x300.png)
