HVAC Codes

Evaporator Temperature Sensor Circuit

The HVAC module has detected an abnormal signal from the evaporator temperature sensor, which monitors the AC evaporator core to prevent icing and regulate compressor cycling.

A/C Refrigerant Pressure Sensor Circuit Malfunction

The A/C refrigerant pressure sensor circuit has an electrical fault.

Lost Communication With HVAC Control Module

The vehicle's main network has lost communication with the HVAC control module.

HVAC Control Module Internal Failure

The HVAC control module has detected an internal processing fault and can no longer reliably control climate functions such as blower speed, mode doors, or temperature blend.

Blend Door Actuator Position Fault

The HVAC system has detected that the blend door actuator is not reaching or holding its commanded position, so the module cannot accurately mix hot and cold air to reach the requested cabin temperature.