# P0731 on the 2018 Hyundai Sonata

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 P0731

- [10127004](https://open.wenmarpro.com/bulletins/10127004), 2018-01-16: This bulletin provides information related to the Engine Control Module \(ECM\) and Transmission Control Module \(TCM\) software updates for certain 2018MY SONATA, equipped with 2.0L turbo engine and 8 speed automatic transmission. These vehicles may experience Malfunction Indication Light illumination with any of the following DTC\(s\) below: ? P219C: Cylinder \#1 Imbalance Error ? P219D: Cylinder \#2 Imbalance Error ? P219E: Cylinder \#3 Imbalance Error ? P219F: Cylinder \#4 Imbalance Error ? P0731: Gear 1 Incorrect Ratio