Oil pressure gauge being maxed out directly after an oil change points to a possible oil issue in the oil change. However, the fact that this is not just maxed out, but the gauge is fully in the pegged state points to a sensor issue.
However, if you need to change the oil again just to be sure then here is a guide that will help just in case you need it:
https://www.2carpros.com/articles/how-to-change-engine-oil-and-filter
If this all checks out, then I would suggest changing the sensor because this is a common issue.
Please run through this and let me know what questions you have.
Thanks
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Saturday, June 11th, 2022 AT 1:24 PM