I’ve had an interesting problem with my spartan 3, which was working perfectly for many months. It is wired correctly, being supplied with 12v and ground properly, though the grounds are in the same place, directly to the battery post via 2ft of battery cable. It is stuck in the heating phase and the sensor is not heating up, making me think that it is one of 2 problems. First is that the spartan could have a failed heater circuit on the board. Second is that the sensor failed. I wanted some feedback and help before just throwing money at it with a new sensor. Its been used via CAN and I was recently trying to use the 5v output at the same time which has worked. Any thoughts on how else to troubleshoot which is the problem?