DTC P2183-21: Engine Coolant Temperature Sensor 2 Circuit Range/Performance - Signal amplitude < minimum: Action
- Check coolant system for blockages or restrictions that prevent coolant flow
- Check for the correct level of antifreeze within the coolant
- Inspect connectors for signs of water ingress, and pins for damage and/or corrosion
- Refer to the appropriate system wiring diagrams and check engine coolant temperature sensor for short circuit to power, short circuit to ground, open circuit, high resistance
- Check and install new engine coolant temperature sensor as required