AutoCodes – Generic – B0433

B0433 Code - Temperature Control #3 Feedback Circuit Malfunction

Quick Answer

The actuators operate using 5 circuits. 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: B0433 indicates Temperature Control #3 Feedback Circuit Malfunction.
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 19,044

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 B0433 Description

The actuators operate using 5 circuits. A 5-volt reference, low reference, signal circuit and two bi-directional 0 or 12 volt control circuits. The Heating, Ventilation, and Air Conditioning (HVAC) Control Module supplies a low reference and 5-volt reference to the potentiometer. The HVAC control module monitors the voltage drop across the potentiometer on the door position signal circuit. As the actuator door changes position the door position signal circuit voltage also changes. The two bi-directional control circuits enable the actuator to operate. Both circuits are set to 0 volts when the HVAC control module detects, from the feedback potentiometer, that the actuator is in the desired position. In order to move the actuator, the HVAC control module switches the appropriate control circuit to 12 volts.

OBDII Code B0433 - Temperature Control #3 Feedback Circuit Malfunction - AutoCodes.com — B0433 Code - Temperature Control #3 Feedback Circuit Malfunction

What does this mean?

What are the Possible Causes of the DTC B0433?

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 and Cooling Systems (HVAC) Control Module

How to Fix the DTC B0433?

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 B0433 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.

Need more information about the B0433 code?

Need more information on how to fix the B0433 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B0433 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

B0433 Buick — Temperature Control #3 Feedback Circuit Malfunction
B0433 Cadillac — Temperature Control #3 Feedback Circuit Malfunction
B0433 Chevrolet — Temperature Control #3 Feedback Circuit Malfunction
B0433 GMC — Temperature Control #3 Feedback Circuit Malfunction
B0433 Hummer — Temperature Control #3 Feedback Circuit Malfunction
B0433 Pontiac — Temperature Control #3 Feedback Circuit Malfunction
B0433 Saturn — Temperature Control #3 Feedback Circuit Malfunction

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 B0433 Code

1. What are common symptoms of OBDII code B0433 (Temperature Control #3 Feedback Circuit Malfunction)?

- Common symptoms include inconsistent temperature control in the vehicle's climate system, hot or cold air blowing unexpectedly, and the climate control system not responding properly.

2. What can cause the OBDII code B0433 to trigger?

- The code B0433 can be triggered by a faulty temperature control sensor, a wiring issue in the feedback circuit, a malfunctioning climate control module, or a problem with the HVAC system.

3. How serious is the OBDII code B0433?

- While the code may not cause immediate harm to the vehicle, it can affect the comfort and functionality of the climate control system. It's best to address the issue to maintain a comfortable driving experience.

4. How can I diagnose the OBDII code B0433?

- Diagnosing the code may involve using an OBDII scanner to read the code, checking the temperature control sensors, inspecting the wiring for any damage, and testing the climate control module for proper functionality.

5. Can I still drive my vehicle with the OBDII code B0433 present?

- It is generally safe to drive the vehicle with this code, but you may experience issues with temperature control in the cabin. It's advisable to have the issue diagnosed and repaired as soon as possible.

6. What are some DIY repair tips for fixing the OBDII code B0433?

- DIY repair tips may include checking and cleaning the temperature control sensors, inspecting and repairing any damaged wiring in the feedback circuit, and resetting the climate control module.

7. Is it recommended to reset the OBDII code B0433 after making repairs?

- Yes, it is recommended to reset the code using an OBDII scanner after making repairs to see if the issue has been successfully resolved. If the code persists, further diagnosis may be necessary.

8. How much does it typically cost to repair the OBDII code B0433?

- The cost of repairing the code B0433 can vary depending on the underlying cause, the extent of the repair needed, and whether it is done by a professional mechanic or as a DIY project. Costs may range from a few dollars for minor fixes to a few hundred dollars for more complex issues.

9. Can extreme temperatures or environmental conditions trigger the OBDII code B0433?

- Extreme temperatures or environmental conditions may not directly trigger the code B0433, but they can potentially exacerbate existing issues with the temperature control system, leading to the malfunction being more noticeable.

10. How long does it typically take to repair the OBDII code B0433?

- The time it takes to repair the code B0433 can vary depending on the cause of the issue, the availability of parts, and whether the repair is done by a professional or as a DIY project. Simple fixes may take a few hours, while more complex repairs could take longer.