B0429
Auxiliary Air Temperature Actuator Range/Performance
B0429 is an OBD-II diagnostic trouble code meaning: Auxiliary Air Temperature Actuator Range/Performance. Common causes: malfunction of the additional air temperature actuator, open or short circuit in wiring harness. Estimated repair cost: $56–167.
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
Related codes
Error B0429 by Vehicle Brand
FAQ
What does the B0429 code mean?
B0429 is an OBD-II diagnostic trouble code that indicates: Auxiliary Air Temperature Actuator Range/Performance
What causes a B0429 error code?
The most common causes of B0429 include: 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 do I fix a B0429 diagnostic trouble code?
To fix B0429: Check the condition of the wiring harness and connectors. Test the additional air temperature actuator. Check signals from the control unit. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with B0429?
Limited driving only, diagnose soon
How much does it cost to fix B0429?
The estimated repair cost for B0429 is $56–167. Actual cost depends on your vehicle, location, and labor rates.
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