AutoCodes – Pontiac – B0429 Pontiac

B0429 Pontiac Code - Auxiliary Air Temperature Actuator Range/Performance

Quick Answer

The Auxiliary Heating, Ventilation, and Air Conditioning (HVAC) actuators are a 5-wire bi-directional electric motor that incorporates a feedback potentiometer. Common causes include Faulty Auxiliary Air Temperature Actuator, Auxiliary Air Temperature Actuator harness is open or shorted, Auxiliary Air Temperature Actuator circuit poor electrical connection. Severity is Low - monitor the vehicle and repair when practical. The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.

What it means: B0429 Pontiac indicates Auxiliary Air Temperature Actuator Range/Performance.
Common causes: Common causes include Faulty Auxiliary Air Temperature Actuator, Auxiliary Air Temperature Actuator harness is open or shorted, Auxiliary Air Temperature Actuator circuit poor electrical connection.
Severity: Low - monitor the vehicle and repair when practical.
Can I drive?: The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.

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Code Popularity 783

How popular is this code, among other codes? Low

Repair Importance Level

Low (Monitor) (1 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Mar 11, 2021

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B0429 Pontiac Description

The Auxiliary Heating, Ventilation, and Air Conditioning (HVAC) actuators are a 5-wire bi-directional electric motor that incorporates a feedback potentiometer. Low reference, 5-volt reference, position signal, and 2 control circuits enable the actuator to operate. The control circuits use either a 0 or 12 volt value to coordinate the actuator movement. When the actuator is at rest, both control circuits have a value of 0 volts. In order to move the actuator, the HVAC control module grounds one of the control circuits while providing the other with 12 volts. The auxiliary HVAC control module reverses the polarity of the control circuits to move the actuator in the opposite direction. When the actuator shaft rotates, the potentiometers adjustable contact changes the door position signal between 0-5 volts. This signal then is converted into a count value where as 1 volt will equal 51 counts.
The auxiliary HVAC control module calibrates the travel range of the HVAC door actuators when it is initially powered by the battery positive voltage circuit. During calibration, the module commands the actuators in each direction until door travel is stopped. The module stores the minimum door positions and the maximum door positions of each actuator into memory. The total travel range is calculated by subtracting the minimum door position from the maximum door position.

OBDII Code B0429 Pontiac - Auxiliary Air Temperature Actuator Range/Performance - AutoCodes.com — B0429 Pontiac Code - Auxiliary Air Temperature Actuator Range/Performance

What does this mean?

What are the Possible Causes of the DTC B0429 Pontiac?

Faulty Auxiliary Air Temperature Actuator
Auxiliary Air Temperature Actuator harness is open or shorted
Auxiliary Air Temperature Actuator circuit poor electrical connection
Faulty Auxiliary Heating, Ventilation, and Air Conditioning (HVAC) Control Module

How to Fix the DTC B0429 Pontiac?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B0429 Pontiac code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

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Need Help with the Code?

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about B0429 Pontiac Code

1. What are common symptoms of OBDII code B0429 in a Pontiac related to the Auxiliary Air Temperature Actuator?

- Common symptoms include poor engine performance, reduced fuel efficiency, and potential issues with the vehicle's heating and cooling systems.

2. What are the possible causes of OBDII code B0429 in a Pontiac?

- The code B0429 typically indicates a malfunction in the Auxiliary Air Temperature Actuator, which can be caused by a faulty actuator motor, wiring issues, or a damaged actuator door.

3. How can I diagnose OBDII code B0429 in my Pontiac?

- Diagnosing OBDII code B0429 may involve using a scan tool to retrieve the specific fault code, inspecting the Auxiliary Air Temperature Actuator for any visible damage, and testing the actuator motor and related wiring for continuity and proper operation.

4. Can I continue driving my Pontiac with OBDII code B0429 present?

- It is not recommended to continue driving your Pontiac with OBDII code B0429 present, as it can lead to further damage to the vehicle's systems and potentially cause more severe issues over time.

5. How can I repair OBDII code B0429 in my Pontiac?

- Repairing OBDII code B0429 may involve replacing the faulty Auxiliary Air Temperature Actuator, repairing any damaged wiring, and clearing the fault code from the vehicle's computer using a scan tool.

6. Are there any tips for preventing OBDII code B0429 in my Pontiac?

- Regularly maintaining your vehicle, including checking and replacing air temperature actuator components as needed, can help prevent OBDII code B0429 from occurring in your Pontiac.

7. Does OBDII code B0429 in a Pontiac affect emissions or vehicle safety?

- While OBDII code B0429 may not directly impact emissions or vehicle safety, it can lead to decreased engine performance and efficiency, which can affect overall vehicle operation.

8. Can a DIY enthusiast repair OBDII code B0429 in a Pontiac?

- Depending on your level of experience and access to tools, a DIY enthusiast may be able to repair OBDII code B0429 by following repair guides and procedures specific to the Auxiliary Air Temperature Actuator.

9. How long does it typically take to repair OBDII code B0429 in a Pontiac?

- The time needed to repair OBDII code B0429 can vary depending on the extent of the issue and the availability of replacement parts. In general, it may take a few hours to a full day to complete the repair.

10. Can resetting the vehicle's computer clear OBDII code B0429 in a Pontiac?

- While resetting the vehicle's computer may temporarily clear the fault code, it is essential to address the underlying issue causing OBDII code B0429 to prevent it from reoccurring.