Useful checks before replacing parts
- Compare sensor A temperature with converter load, 12-volt output, cooling operation, ambient temperature, freeze-frame data, and related high-input codes.
- Inspect for open sensor circuits, short-to-voltage faults, poor grounds, connector corrosion, cooling restrictions, and real converter overheating.
- Measure signal and ground voltage under operating load to determine whether the high reading is electrical or thermal.
Related OBD-II codes
These nearby hybrid / ev entries can help compare wording and fault area. They may share the same verification status as the source database.