Coolant thermostat
â–¶ How to fix
- Check wires and connectors of the coolant thermostat - Check the engine temperatur sensor - Replace coolant thermostat
What you'll see
No driver-visible symptom recorded.
System reaction
- Engine coolant temperatur is to low - Engine starts and runs bad
Diagnostic depth
Detection
- Fault is detected if the modeled coolant-temperature is higher than real coolant-temperature - The real coolant-temperature is lower than a defined threshold
Possible cause
- Coolant thermostat has a failure - Coolant thermostat is stuck open