P0EC4

A/C Refrigerant Temperature Sensor B Range/Performance

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$17–44 (est.)

Symptoms

Incorrect operation of the air conditioner
No air cooling
Interruptions in the operation of the air conditioning system
Hot air from the ventilation system

Causes

Refrigerant temperature sensor B fault
Damage to the wiring to the sensor
Poor contact in the sensor connector
Low refrigerant level
Problems with the air conditioning control unit

How to Fix

Check refrigerant level
Inspect the sensor wiring and connectors
Test coolant temperature sensor B
Replace faulty sensor
Reset the air conditioning system

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