B0428

Auxiliary Air Temperature Actuator

Severity

✅ Low

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$22–56 (est.)

Symptoms

Incorrect operation of climate control
Incorrect display of interior temperature
An error appears on the dashboard

Causes

Additional air temperature sensor malfunction
Open or short circuit in wiring harness
Problems with the climate control unit
Poor contact in sensor connectors

How to Fix

Check the integrity of the additional air temperature sensor
Check the wiring harness for breaks and short circuits
Check the contacts in the sensor connectors
Replace sensor if necessary
Reset the error and check the system operation

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