P1881
Engine Coolant Level Switch Circuit Failure
Severity
⚠️ MediumCan you drive?
Limited driving only, diagnose soon
Approx. repair cost
$6–28 (est.)
Symptoms
- Low coolant level indicator is on
- Incorrect coolant level readings on the dashboard
- False overheating warnings
- Possible turning on of the cooling fan for no reason
Causes
- Coolant level sensor malfunction
- Open or short circuit in the sensor circuit
- Poor contact in the sensor connector
- Sensor contact corrosion
- Problems with the engine control unit
How to Fix
- Check the coolant level and add if necessary
- Inspect the level sensor for damage
- Check the integrity of wiring and contacts
- Replace the coolant level sensor if necessary
- Check and clean the sensor connector contacts