P0539

A/C Evaporator Temperature Sensor Circuit Intermittent

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$33–89 (est.)

Symptoms

Incorrect operation of the air conditioner
Intermittent compressor on/off
Increased or decreased temperature in the cabin

Causes

Open or short circuit in wiring harness
Poor contact in sensor connectors
Evaporator temperature sensor malfunction
Problems with the climate control unit

How to Fix

Check the integrity of the wiring harness and connectors
Test the resistance of the evaporator temperature sensor
Replace sensor if necessary
Clean connector contacts
Check the operation of the air conditioner after repair

Related codes

P0537 P0538 P0540