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2022 CHEVROLET BOLT EUV
65 kWh Single Motor FWD•FWD•AUTOMATIC•ev
4 active safety recalls on this vehicle — view recalls
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Repairs0Labor314Torque3680Fluid5DTC849Battery1Maintenance0Recalls4
B1024low severityBody

A/C Evaporator Temperature Sensor Circuit High

on 2022 Chevrolet Bolt EUV 65 kWh Single Motor FWD · FWD

What this code means

The HVAC module sees high voltage on the evaporator temperature sensor circuit, meaning an open or short-to-power. No exact OBD P-code equivalent (similar to P0535).

Symptoms

  • A/C not cooling properly
  • Erratic HVAC operation
  • Fan runs but weak cold air

Common causes

  • Faulty evaporator temp sensor
  • Open in sensor wiring
  • Short to power on signal wire
  • Corroded connector

Diagnostic steps

  1. Check sensor connector for damage
  2. Measure sensor resistance vs spec
  3. Check signal wire for short to power
  4. Test HVAC module reference voltage
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