SFP Threshold violation?

[Andy White]

Hello,

One of our 3750 switches is getting this error, is it a faulty SFP?  There is nothing plugged into it?

SFF8472-5-THRESHOLD_VIOLATION: Gi1/0/4: Tx power low alarm; Operating value: -40.0 dBm, Threshold value: -13.5 dBm.

Thanks

[sean_evershed]

It's not faulty. Shut down the port and the error should stop.