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2017 TOYOTA SW4
2.7L I4 2TR-FE•RWD•AUTOMATIC•gas•2TR-FE
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Repairs0Labor489Torque398Fluid8DTC1945Battery1Maintenance0Recalls0
P0538low severityPowertrain

A/C Evaporator Temperature Sensor Circuit High

on 2017 Toyota SW4 2.7L I4 2TR-FE · RWD

What this code means

The A/C evaporator temperature sensor signal is too high. This suggests an open circuit or a faulty sensor.

Symptoms

  • A/C cooling problems
  • Compressor cycling issues
  • Check engine light on

Common causes

  • Faulty evaporator temp sensor
  • Open circuit in wiring
  • Bad connector
  • Faulty PCM

Diagnostic steps

  1. Retrieve codes
  2. Inspect wiring for opens
  3. Test sensor resistance
  4. Verify signal with scan tool
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