2017 RT with Codes P0556 and P0504 - Any ideas?

2017 Spyder RT: Since the water pump was replaced this week on my 2017 Can-Am Spyder RT, the check engine light is on, and the diagnostic procedure displays codes P0556 and P0504. About a month and a half ago we replaced the belt but never drove it until dropping the Spyder off at the dealer for the water pump repair. The Spyder starts normally and the brakes seem to work normally. I don't have brake fluid on hand but I was wondering if the mechanic could have messed with something to cause this. Any ideas? It's an hour's drive to any mechanic to fix it, unless someone here knows a mechanic in the St. Augustine FL area?

Thanks a lot to those who responded. I must say, this forum could use some AI. I typed the codes and got no response, then added a little to the codes to see if something would come up. Nothing. I wish I had found the posts mentioned above by Peter.

My bike had not been ridden for about two months. The belt broke in Washington State on the Canadian border. I trailered it to Hood river where we replaced the belt but we started it to put it on the trailer. When I arrived at the dealer a couple of weeks later, I started it to get it off the trailer and drive it maybe one hundred yards. Then it sat at the dealer's for a few days before they checked belt alignment and installed a belt tensioner. They discovered the water pump was leaking, so it sat for two more weeks for the replacement part. I drove it forty miles home when several lights came on. All but the check engine light went out. I've driven it around on several occasions. The brake light works fine, the motor runs great, but the check engine light is still on, so I checked the codes. Now, I'll check the battery connections in the AM. But maybe the battery is not fully charged.