AutoCodes – Chevrolet – B0238 Chevrolet

B0238 Chevrolet Code - Air Flow Control 1 Circuit

Quick Answer

Stepper motors are used for temperature regulation, air distribution control and recirculation door control. Common causes include Faulty Defrost Actuator, Defrost Actuator harness is open or shorted, Defrost 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: B0238 Chevrolet indicates Air Flow Control 1 Circuit.
Common causes: Common causes include Faulty Defrost Actuator, Defrost Actuator harness is open or shorted, Defrost 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 1,154

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 10, 2021

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B0238 Chevrolet Description

Stepper motors are used for temperature regulation, air distribution control and recirculation door control. With the switches and dials on the HVAC controls, air temperature door position, mode door position and recirculation door position can be selected. The selected values are passed to the Heating, Ventilation, and Air Conditioning (HVAC) Control Module via serial data. The HVAC control module supplies a 12 V reference voltage to the stepper motors and energizes the 4 stepper motor coils with a pulsed ground signal. The stepper motors move the appropriate doors into the calculated positions, in order to reach the desired positions.

OBDII Code B0238 Chevrolet - Air Flow Control 1 Circuit - AutoCodes.com — B0238 Chevrolet Code - Air Flow Control 1 Circuit

What does this mean?

What are the Possible Causes of the DTC B0238 Chevrolet?

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

How to Fix the DTC B0238 Chevrolet?

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 B0238 Chevrolet 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 B0238 Chevrolet code?

Need more information on how to fix the B0238 Chevrolet code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B0238 Chevrolet code diagnosed by a professional: Find a repair shop in your area

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 B0238 Chevrolet Code

1. What are the common symptoms of OBDII code B0238 (Chevrolet) related to the Air Flow Control 1 Circuit?

The common symptoms include poor engine performance, rough idling, stalling, and potential issues with the vehicle's fuel efficiency.

2. What are the possible causes of OBDII code B0238 (Chevrolet) indicating a problem with the Air Flow Control 1 Circuit?

Possible causes include a faulty air flow control actuator, wiring issues, a malfunctioning air flow control module, or a problem with the vehicle's computer system.

3. How can I diagnose the root cause of OBDII code B0238 (Chevrolet) concerning the Air Flow Control 1 Circuit?

Diagnosing the issue typically involves using an OBDII scanner to retrieve the trouble codes, conducting a visual inspection of the wiring and components, and performing specific tests recommended by the vehicle manufacturer.

4. Is it safe to continue driving with OBDII code B0238 (Chevrolet) triggered by Air Flow Control 1 Circuit issues?

It is not recommended to continue driving with this code triggered, as it can lead to further damage to the vehicle and potentially unsafe driving conditions.

5. How can I repair OBDII code B0238 (Chevrolet) associated with the Air Flow Control 1 Circuit?

Repair options may include replacing the air flow control actuator, repairing or replacing damaged wiring, replacing the air flow control module, or reprogramming the vehicle's computer system.

6. Can I reset the OBDII code B0238 (Chevrolet) related to Air Flow Control 1 Circuit without fixing the underlying issue?

While you can clear the code using an OBDII scanner, it will likely reappear until the root cause of the problem is addressed and resolved.

7. Are there any DIY tips for addressing OBDII code B0238 (Chevrolet) linked to the Air Flow Control 1 Circuit?

DIY tips may include checking and cleaning the air flow control components, ensuring proper wiring connections, and following the vehicle manufacturer's service manual for guidance.

8. How much does it typically cost to repair OBDII code B0238 (Chevrolet) regarding the Air Flow Control 1 Circuit?

The cost of repair can vary depending on the specific cause of the issue, but it may range from a few hundred to a few thousand dollars, including parts and labor.

9. Can a mechanic easily fix OBDII code B0238 (Chevrolet) associated with the Air Flow Control 1 Circuit?

A qualified mechanic with experience in diagnosing and repairing automotive electrical systems should be able to effectively address the issue and clear the trouble code.

10. How often does OBDII code B0238 (Chevrolet) related to the Air Flow Control 1 Circuit occur in vehicles?

The occurrence of this specific OBDII code can vary among different Chevrolet models, but it is a relatively common issue that may require attention to ensure proper vehicle operation.