# P033C on the 2021 Maserati Quattroporte

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 P033C

- [11021166](https://open.wenmarpro.com/bulletins/11021166), 2025-08-01: This bulletin provides a corrective procedure for addressing false knock sensor DTCs caused by moisture accumulation. The procedure involves performing a controlled warm\-up cycle to burn off the moisture from the sensor area, helping to resolve DTCs such as P0327, P0332, P032C, and P033C without unnecessary sensor replacement. Models Involved: \(M156\) Quattroporte, \(M157\) Ghibli, \(M161\) Levante \(V6 \& V8 engines\) ALL MY