B0429

Auxiliary Air Temperature Actuator Range/Performance

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$56–167 (est.)

Symptoms

Incorrect operation of climate control
Inconsistent air temperature in the cabin
Lack of system response to temperature adjustment

Causes

Malfunction of the additional air temperature actuator
Open or short circuit in wiring harness
Poor contact or corrosion in connectors
Malfunction of the climate control control unit

How to Fix

Check the condition of the wiring harness and connectors
Test the additional air temperature actuator
Check signals from the control unit
Replace faulty actuator or wiring harness
Reset the error and check the system operation

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