P0535 code meaning
A/C Evaporator Temperature Sensor Circuit
What P0535 means
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. P0535 is the general circuit fault; the compressor is usually locked out or run with a substitute value. No manufacturer document available to us uses this code; the description follows CARB's input component rules.
P0535 at a glance
- Check engine lightUsually not
- Emissions testNot an emissions code
- Limp modeNot expected
- Repair difficultyMedium, DIY possible
- Typical labor0.5 to 4 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P0535
- Air conditioning not or weakly cooling
- Evaporator icing, airflow decreasing
- Compressor cycling unusually
Common causes of P0535
- Most likelySensor faulty
- Most likelyConnector corroded by condensate
- PossibleWire open or shorted
- Less likelyEngine module
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Evaporator temperature sensorSensor wiringEngine control module
What each part of P0535 means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 5 | Area: vehicle speed, idle control and auxiliary inputs. |
| 35 | The exact fault in that area. |
What to do next
- Note P0535 and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about P0535
What does P0535 mean?
P0535 means "A/C Evaporator Temperature Sensor Circuit". The evaporator temperature sensor, an NTC thermistor behind the evaporator, prevents icing: near 0–3 °C the compressor is switched off or reduced. It is a generic code, so it means the same on every make.
Is it safe to drive with P0535?
P0535 does not normally turn on the check engine light by itself. Watch for the symptoms above and have it checked soon.
Will P0535 fail an emissions test?
P0535 is not an emissions code, so on its own it usually does not fail an emissions test. Other stored codes or a lit check engine light still can.
How hard is P0535 to fix?
Difficulty: medium. A typical repair takes 0.5 to 4 hours of work. A careful DIY repair is possible with basic tools and a scanner.
Will P0535 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.