P0536A/C Evaporator Temperature Sensor Circuit Range/Performance
- Generic OBD-II code · Powertrain
- How the car detects it
- The evaporator temperature sensor, an NTC thermistor behind the evaporator, prevents icing: near 0–3 °C the compressor is switched off or reduced. Usually the climate module reads it and reports body codes; P0535–P0539 only arise where the engine module controls the compressor and reads the sensor. P0536 means the signal is valid but implausible – for example it differs from other temperature sensors after standstill, or does not drop after compressor engagement. Hella compares it with the cabin sensor with A/C off. Icing protection then works wrongly. No manufacturer document available to us uses this code; the description follows CARB's input component rules.
- What you may notice
- Fluctuating or weak cooling
- Evaporator icing
- Compressor switching off too early
- Likely causes
- LikelySensor drifting
- PossibleSensor not seated correctly in the evaporator
- PossibleRefrigerant shortage or compressor fault
- RareContact resistance in the connector
- Repair
- Medium · Often possible to do yourself.Typical cost: €30 – €400
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.