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P0536 A/C evaporator temperature sensor: reading or operation not right

By: Diagno editorial team · Updated: 2026-10-15

P0536 means: A/C evaporator temperature sensor: reading or operation not right. The computer controls the air conditioning compressor and monitors refrigerant pressure. OK to drive, but have it checked soon. The most common repair costs about €60–120 in Estonia, depending on make and model. The most common cause: low refrigerant (leak).

Is it safe to drive?OK to driveOK to drive, but have it checked soon.

Leak check and hose or gasket replacement€60–120parts and labour in Estonia, depending on make and model

What it means

The computer controls the air conditioning compressor and monitors refrigerant pressure. The A/C may not cool, but this doesn't harm the engine. There is a signal, but the reading or operation isn't plausible. The cause may be the part itself or a real mechanical fault.

What you may notice

A/C doesn't cool
Compressor doesn't engage
Engine light may be on

What could be wrong

1Low refrigerant (leak) · Leak check and hose or gasket replacement €60–120
2Faulty pressure sensor · Pressure sensor replacement €90–180
3Compressor relay or clutch · Clutch replacement €450–900
4Wire or connector · Wiring or connector repair €45–90

Repair difficulty: Moderate

What you can check yourself

Listen for the compressor clicking on when you switch on the A/C. If it hasn't been serviced for years, the refrigerant may be low. You can check the simple things yourself, but the repair is best done in a workshop.

How we fix it

We measure refrigerant pressure and look for leaks
We check the sensor, relay and clutch
We recharge the system or replace the faulty part

Standard SAE description: A/C Evaporator Temperature Sensor Circuit Range/Performance

Check the fuse · If a light, the horn, wipers, a socket or the fuel pump is dead, a blown fuse may be the cause.Fuse boxes by car →

Want a definite answer?

Bring the car to our workshop in Estonia for diagnostics. We read the fault codes, test the sensors and tell you what is wrong. Repair price depends on the work involved, generally €45 per hour.

Book a diagnostic check

Questions

What does fault code P0536 mean?

A/C evaporator temperature sensor: reading or operation not right. The computer controls the air conditioning compressor and monitors refrigerant pressure. The A/C may not cool, but this doesn't harm the engine. There is a signal, but the reading or operation isn't plausible. The cause may be the part itself or a real mechanical fault.

Can I drive with code P0536?

OK to drive, but have it checked soon.

How much does it cost to fix P0536?

It depends on the cause: leak check and hose or gasket replacement €60–120; pressure sensor replacement €90–180; clutch replacement €450–900. Prices include labour at €45/h, depending on make and model.

How is P0536 fixed?

We measure refrigerant pressure and look for leaks. We check the sensor, relay and clutch. We recharge the system or replace the faulty part.

Based on AI combined with our hands-on workshop experience and knowledge. This information is general and prices are approximate (Estonian workshop rates). The same code can mean different things on different cars. Only an inspection of the car gives a definite answer.