B1597: Air Mix On/Off Switch Potentiometer Short (High) – Console

Definition: This diagnostic trouble code (DTC) indicates a short circuit in the air mix on/off switch potentiometer, specifically when the voltage is higher than expected. This issue typically relates to the console’s climate control system, affecting how air temperature is regulated within the vehicle.

B1597: Air Mix On/Off Switch Potentiometer Short (High) – Console

Typical Severity: Moderate

Common Causes

B1597: Air Mix On/Off Switch Potentiometer Short (High) – Console

Common Causes:

• Faulty air mix on/off switch potentiometer
• Short circuit in the wiring of the air mix on/off switch potentiometer
• Defective climate control module

Common Misdiagnosis

OBD2 Code: B1597

Description: Air Mix On/Off Switch Potentiometer Short (High) – Console

Common Misdiagnosis: Replacing the air mix switch or potentiometer without checking for wiring harness issues or connector problems.

Common Diagnostic Steps

OBD2 Code: B1597

Description: Air Mix On/Off Switch Potentiometer Short (High) – Console

• Check the air mix switch for any visible signs of damage or wear.
• Inspect the wiring and connectors associated with the air mix switch for any signs of corrosion, damage, or disconnection.
• Use a multimeter to test the potentiometer’s resistance values to ensure they are within manufacturer specifications.
• Verify that there is no short circuit in the wiring by checking continuity between wires and ground.
• If applicable, use a scan tool to clear the code and see if it returns after performing repairs or adjustments.
• If problems persist, consider replacing the air mix switch potentiometer or consult a professional technician for further diagnosis.