# P1A77 on the 2021 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.

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

## Bulletins for this model year that name P1A77

- [10233643](https://open.wenmarpro.com/bulletins/10233643), 2023-04-06: TECHNICAL SERVICE BULLETIN: MQ4 P/HEV GAMMA 1.6L T\-GDI ECM \& HCULDC LOGIC IMPROVEMENT FOR OIL DILUTION: This bulletin provides the procedure to update the software logic of the 'Engine' and Hybrid Control Unit Low DC\-DC Converter 'HCULDC' systems on certain 2021\-2023MY Sorento HEV, PHEV \(MQ4 P/HEV\) w/ Gamma 1.6L T\-GDI vehicles produced from July 1, 2021 through November 3, 2022. The affected vehicles may exhibit a MIL 'ON' with DTCs stored \(P144100, P1A7795, P00B700, P211800, P040100, P023600, P029900, P2B6000\) due to the engine oil becoming diluted with fuel and/or moisture caused by repeated short drive trips, in low outdoor temperature \(32 degree F\-\) environments.