It sounds like the dealer is correct based on the information provided, however you never know until you get into the actual hands on troubleshooting. For example, something as simple as an old battery can cause all kinds of craziness on new cars.
In the attached troubleshooting guide one of the first step states "Check the Battery for proper State of Charge (SOC) and the Charging System for proper operation." Just about everyone on here will ask about the age/status of the car's battery. Most car batteries only last about three to four years. Given you car is a 2021, I would assume it might have the original battery.
If it is the original battery, I would be proactive and change it because it may not have much life left in it. I like the Interstate brand of batteries and Costco has them at a great price, but you have to install it yourself. If you do install it yourself, always disconnect the negative terminal first (put it on last) and don't forget to pull the vent tube back on the new battery. I also like using NCP2 on the terminals to help prevent corrosion.
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If you want to perform some troubleshooting yourself, take the codes and put them into the Chilton Library. Most public library's offer this service for free. Just log into your library's website and search for Chilton.
Below is an excerpt from the Chilton Library for the codes. I have also attached the communication diagnostic procedures as an example of the information you will find there.
C0044-01: Brake Pressure Sensor 1 - General Electrical Failure. The Anti-lock Brake System (ABS) Module indicates that the Brake Pressure Sensor Signal is out of range. For this failure it is necessary to replace both the Anti-lock Brake System (ABS) Module and the Hydraulic Control Unit (HCU) as a complete unit. This is known as the Integrated Control Unit (ICU).
Possible Causes
Anit-Lock Brake System (ABS) Module
Hydraulic Control Unit (HCU)
Integrated Control Unit (ICU)
U0418-00: Implausible data received from brake system control module 1. The communication diagnostic procedure must be performed before replacing any component(s) or module(s).
C0572: Master Cylinder Pressure Sensor Circuit High
Possible Causes
Hydraulic Control Unit (HCU)
Integrated Control Unit (ICU)
Anit-Lock Brake System (ABS) Module