# P0171 on the 2015 Kia Sorento

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.

Nobody has written a description of this code yet.

## Bulletins for this model year that name P0171

- [10109774](https://open.wenmarpro.com/bulletins/10109774), 2017-08-02: TSB: ECU UPGRADE ? MIL ON WITH DTC\(s\) P0420/P0171 \- This bulletin provides information related to the ECU software upgrade for some 2012\~2015MY Optima \(QF\) vehicles, produced from August 12, 2011 to October 2, 2015, some 2012\~2015MY Sorento \(XMa\) vehicles, produced from April 19, 2011 to December 11, 2014, some 2011\~2015MY Optima \(TF\) vehicles, produced from August 12, 2010 to July 23, 2015, and some 2014\~2016MY Sportage \(SL\) vehicles, produced from September 30, 2013 to November 16, 2015, which may experience a malfunction indicator lamp \(MIL\) illuminated with the Electronic Control Unit \(ECU\) system\-related DTC\(s\): P0420 and possibly P0171. This concern occurs most commonly during prolonged engine braking while descending a steep grade.
- [10109683](https://open.wenmarpro.com/bulletins/10109683), 2017-08-02: TSB: ECU UPGRADE ? MIL ON WITH DTC\(s\) P0420/P0171 \- This bulletin provides information related to the ECU software upgrade for some 2012\~2015MY Optima \(QF\) vehicles, produced from August 12, 2011 to October 2, 2015, some 2012\~2015MY Sorento \(XMa\) vehicles, produced from April 19, 2011 to December 11, 2014, some 2011\~2015MY Optima \(TF\) vehicles, produced from August 12, 2010 to July 23, 2015, and some 2014\~2016MY Sportage \(SL\) vehicles, produced from September 30, 2013 to November 16, 2015, which may experience a malfunction indicator lamp \(MIL\) illuminated with the Electronic Control Unit \(ECU\) system\-related DTC\(s\): P0420 and possibly P0171. This concern occurs most commonly during prolonged engine braking while descending a steep grade.