P0E81

Auxiliary Cooling System Coolant Temperature Sensor A Circuit

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$17–56 (est.)

Symptoms

Check Engine Light Is On
Incorrect operation of the cooling system
Components may overheat
Reduced cooling efficiency
Errors in climate control operation (if related to the system)

Causes

Coolant temperature sensor malfunction
Open or short circuit in the sensor circuit
Poor contact in connectors
Low coolant level
Problems with the engine control unit

How to Fix

Check coolant level
Visually inspect the sensor and its connections
Check sensor resistance at different temperatures
Check the integrity of wiring and connectors
If necessary, replace the temperature sensor

Related codes

P0E82 P0E80 P0115