Definitely going to need to check continuity on the bake element. Just to make sure it is indeed good. I would also check to make sure you are receiving a full 240 volts to said element. Lastly if those two check well you may be looking at an out of range oven sensor or possibly a bad main control. All of which can cause similar issues.

Check continuity on the bake element should be somewhere between 10-30 ohms. Check to make sure you have 240 volts at the bake element when on. For the sensor... they can be difficult depends on the temperature how many ohms you should recieve. There isn't much of a generic test because they differ greatly between makes, and brands. You could always buy a new sensor and compare readings or just replace it as it is much cheaper than the main control for your unit. Lastly when all else fails or you do not want to gamble on buying a sensor... call a professional to come out and diagnose the machine. I hope some of this was at least a little helpful

Ideally you would like to have one terminal off of the element when testing in case you do not have 240 volts you can see what voltage you are receiving from each side of the circuit. This can be pretty dangerous to attempt as 240 volts and the high amp draw can be fatal. If you've never tested something like this or had anY experience I would recommend a professional to do so.

It definitely sounds like a control issue sensor will register the temp on display if its still lower than what you set it for the control should still be calling for voltage to the bake element. Glad i could help!!!