B0428
Auxiliary Air Temperature Actuator
B0428 is an OBD-II diagnostic trouble code meaning: Auxiliary Air Temperature Actuator. Common causes: additional air temperature sensor malfunction, open or short circuit in wiring harness. Estimated repair cost: $22–56.
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
Related codes
Error B0428 by Vehicle Brand
FAQ
What does the B0428 code mean?
B0428 is an OBD-II diagnostic trouble code that indicates: Auxiliary Air Temperature Actuator
What causes a B0428 error code?
The most common causes of B0428 include: Additional air temperature sensor malfunction; Open or short circuit in wiring harness; Problems with the climate control unit; Poor contact in sensor connectors.
How do I fix a B0428 diagnostic trouble code?
To fix B0428: 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. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with B0428?
Limited driving only, diagnose soon
How much does it cost to fix B0428?
The estimated repair cost for B0428 is $22–56. Actual cost depends on your vehicle, location, and labor rates.
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