Coolant heat sensor overheating but it is an electrical issue?

My coolant heat sensor on my car listed above (RS) has been overheating regularly for a while now I just replaced the sensor today and it's still throwing the code. Once my car gets up to temp and warm it'll stop throwing the code. Once after throwing the code I let it sit overnight outside in 30 degrees and the first thing when I started my car it still said it was overheating what should I try taking a look at next other than my cht sensor.