# C1356 on the 2016 Kia Optima

The bulletins listed name this code in NHTSA's summary, or are about the same components. A bulletin or a recall listed here may apply to the model year. None of it is a diagnosis.

This code is specific to a manufacturer and is not described here.

## Bulletins for this model year that name C1356

- [10091945](https://open.wenmarpro.com/bulletins/10091945), 2017-02-16: THIS BULLETIN PROVIDES INFORMATION RELATED TO AN IBAU \(INTEGRATED BRAKE ACTUATION UNIT\) SOFTWARE UPGRADE FOR SOME 2014\-2016 MY OPTIMA HYBRID \(TF HEV\) VEHICLES, PRODUCED FROM DECEMBER 2, 2013 THROUGH JULY 22, 2015, WHICH MAY EXHIBIT A MALFUNCTION INDICATOR LIGHT \(MIL\) ON WITH DTC C1356 AND NO DRIVABILITY CONCERNS. TO RESOLVE THE CONCERN, REPROGRAM THE IBAU USING THE GDS/KDS DOWNLOAD, AS DESCRIBED IN THIS BULLETIN.
- [10089466](https://open.wenmarpro.com/bulletins/10089466), 2017-01-25: TSB: ECU UPGRADE – MIL ON WITH DTC C1356 \- THIS BULLETIN PROVIDES INFORMATION RELATED TO AN IBAU \(INTEGRATED BRAKE ACTUATION UNIT\) SOFTWARE UPGRADE FOR SOME 2014\~2016MY OPTIMA HYBRID \(TF HEV\) VEHICLES, PRODUCED FROM DECEMBER 2, 2013 THROUGH JULY 22, 2015, WHICH MAY EXHIBIT A MALFUNCTION INDICATOR LIGHT \(MIL\) ON WITH DTC C1356 AND NO DRIVABILITY CONCERNS. TO RESOLVE THE CONCERN, REPROGRAM THE IBAU USING THE GDS/KDS DOWNLOAD, AS DESCRIBED IN THIS BULLETIN. FOR CONFIRMATION THAT THE LATEST REFLASH HAS BEEN PERFORMED, VERIFY ROM ID USING THE TABLES IN THIS TSB.