There is a new Tech Bulletin out for the Fiat 500L dated August 15, 2013. If you get a check engine light and the code is P113D, Fiat has a new software update that takes care of this. Here is a tip, it pays to have a TSB number handy when you talk to your service advisor, don't assume he is aware of these bulletins. Details below:

Fiat 500L TSB 18-033-13- Check Engine Light - DTC P113D Sensor 1/1 Slow Response

Flash: MIL Illumination - DTC P113D Sensor 1/1 Slow Response

A small number of customers may experience a Malfunction Indicator Lamp (MIL)
illumination. Upon further investigation the Technician may find the following Diagnostic
Trouble Code (DTC) P113D O2 Sensor 1/1 Slow Response.

Perform a refalsh to correct the issue.