Severity: Fix within days. Drive with caution and watch for new symptoms.
The computer is getting no usable signal from the sensor that reports engine coolant temperature, so it cannot manage warm-up, fuel mix, or the cooling fan correctly.
Check the coolant level, inspect the wiring and connector, and replace the sensor if it gives no signal.
The temperature gauge may read wrong and the fan may run at the wrong time. Watch the gauge and coolant level closely.
You can drive short distances carefully; watch for worsening symptoms. The temperature gauge may read wrong and the fan may run at the wrong time. Watch the gauge and coolant level closely.
The most common causes are: Failed coolant temperature sensor; Damaged wiring or connector; Low coolant level; Corroded terminals. A scan tool and a visual check of the parts above is where a technician starts.
Check the coolant level, inspect the wiring and connector, and replace the sensor if it gives no signal.
