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2005 GMC CANYON
3.5L I5•4WD•AUTOMATIC•gas
3 active safety recalls on this vehicle — view recalls
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Repairs0Labor511Torque3508Fluid10DTC1896Battery1Maintenance0Recalls3
B0423low severityBody

HVAC Air Temperature Sensor Circuit

on 2005 GMC Canyon 3.5L I5 · 4WD

What this code means

The HVAC air temperature sensor circuit is reading out of range or has failed. This affects the automatic climate control system's ability to regulate cabin temperature.

Symptoms

  • Inaccurate cabin temperature control
  • HVAC blows wrong temperature air
  • Climate control display errors

Common causes

  • Faulty air temperature sensor
  • Damaged sensor wiring or connector
  • Corroded connector pins
  • HVAC control module fault

Diagnostic steps

  1. Scan for HVAC-related codes
  2. Check sensor connector and wiring
  3. Measure sensor resistance vs temperature
  4. Compare readings to service data specs
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Other Body codes on this vehicle

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🔧 Database maintained under the daily editorial review of Chris Hackleman · Master Technician · 20+ years. Spot an error? Use the Help link above — a human reads every report.
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