P0EC5

A/C Compressor Motor Speed Sensor Range/Performance

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$28–167 (est.)

Symptoms

The air conditioner does not work correctly or does not turn on
Increased noise from the air conditioning compressor
Noticeable reduction in cooling efficiency
Flashing air conditioner indicator on the instrument panel
Unstable operation of the air conditioner when driving

Causes

Compressor motor speed sensor malfunction
Open or short circuit in the sensor circuit
Poor contact in the sensor connector
Problems with the compressor motor itself
Air conditioning control unit malfunction

How to Fix

Check the integrity of the sensor wiring and connectors
Test the speed sensor using diagnostic equipment
Check the operation of the compressor motor
Replace the speed sensor if it is confirmed to be faulty
If necessary, replace the air conditioning compressor assembly