P0536: Air Conditioning Evaporator Temperature Sensor Circuit Range/Performance
What to do
Driveable, with air conditioning that may cycle oddly or cool poorly.
What this code means
The evaporator temperature reading is implausible — not falling when the compressor runs, or disagreeing with cabin temperature. Comparing it against the ambient sensor on a cold vehicle that has stood overnight is the simplest check, and they should agree closely.
Likely causes
Start here
- Faulty air conditioning evaporator temperature sensor · specialist
- Sensor drifted out of calibration · specialist
Less common
- Sensor displaced from its mounting · specialist
- Low refrigerant charge · moderate
Symptoms
Components involved
Information, not instruction
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Have anything you intend to act on checked by a trained person against the manufacturer's own procedure for your vehicle. Nothing here replaces that procedure.
Community experience
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What makes one worth reading:
- The car — make, model, year and engine. The same fault behaves differently on each.
- What you measured, not only what you replaced.
- What actually fixed it — or that nothing did, which is worth knowing too.
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