P0E84

Auxiliary Cooling System Coolant Temperature Sensor A Circuit High

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$17–56 (est.)

Symptoms

Check Engine light comes on
Incorrect operation of the cooling system
Engine overheating in some operating modes
Reduced cooling efficiency
Possible reduction in engine power

Causes

Coolant temperature sensor malfunction
Open or short circuit in the sensor circuit
Poor contact in sensor circuit connectors
Engine control unit malfunction
Problems in the additional cooling system

How to Fix

Check the continuity of the coolant temperature sensor circuit
Check the sensor readings using a diagnostic tool
Replace the coolant temperature sensor if necessary
Check and restore contacts in the circuit connectors
Check the operation of the additional cooling system

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