Climate Control

Driver's and passenger's side vent temperatures vary by more than 20 °F (11 °C)

Driver's and passenger's side vent temperatures vary by more than 20 °F (11 °C)

Probable causes: The recirculation control door or the air mix door is malfunctioning

Do the following troubleshooting:

Front air mix control motor test Front Air Mix Control Motor Test

Recirculation control motor circuit troubleshooting Recirculation Control Motor Circuit Troubleshooting (With Climate Control)

Also check for

HVAC DTCs How to Troubleshoot the Climate Control System

Also check for

Poor or loose connections at the terminals