Severity: Fix within days. Drive with caution and watch for new symptoms.
The coolant temperature sensor is reporting a temperature far colder than the engine should be, which usually means an open circuit.
Inspect the connector and wiring, then replace the sensor if it stays stuck at the cold extreme.
The engine may run rich, idle high, and use more fuel. The fan may not come on when needed, so watch the temperature.
You can drive short distances carefully; watch for worsening symptoms. The engine may run rich, idle high, and use more fuel. The fan may not come on when needed, so watch the temperature.
The most common causes are: Failed coolant temperature sensor; Disconnected connector; Broken sensor wiring; Corroded terminals. A scan tool and a visual check of the parts above is where a technician starts.
Inspect the connector and wiring, then replace the sensor if it stays stuck at the cold extreme.
