2013 Chevrolet Volt Owner Manual - Page 237

Driving and Operating . 9-51 Solid Yellow - Vehicle is plugged in. It is normal for the CSI to turn yellow for a few seconds after plugging in a compatible charge cord. The solid yellow may be extended depending on the vehicle and if there is a total utility interruption via OnStar. See "Utility Interruption of Charging" later in this section. This may also indicate that the charging system has detected a fault and will not charge the battery. See "Charge Cord Status Indicators" in the charge cord user manual. The system may be thermally conditioning the battery during any of the states above, requiring electrical energy to be transferred to the vehicle. If the vehicle is plugged in and vehicle power is on, the CSI will be on solid green. The same is true during a remote start if the vehicle is plugged in. If the vehicle is plugged in and the CSI is off, a total utility interruption using OnStar or a charging fault has been detected. See "Utility Interruption of Charging" or "Charge Cord Status Indicators" in the charge cord user manual. This chart indicates vehicle feedback when the charge cord is plugged in.