AutoCodes – Pontiac – B0238 Pontiac

B0238 Pontiac 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 Pontiac 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 948

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

What does this mean?

What are the Possible Causes of the DTC B0238 Pontiac?

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 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 B0238 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.

Need more information about the B0238 Pontiac code?

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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 B0238 Pontiac Code

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

The common symptoms include rough idling, stalling, poor engine performance, and possible illumination of the Check Engine Light.

2. What are the possible causes of OBDII code B0238 Pontiac for the Air Flow Control 1 Circuit?

Potential causes may include a faulty air flow control actuator, damaged wiring or connectors, or a malfunctioning powertrain control module (PCM).

3. How can I diagnose the OBDII code B0238 Pontiac for the Air Flow Control 1 Circuit?

Diagnosis typically involves using a scan tool to read the code, inspecting the air flow control actuator and related components for damage, and testing the wiring and connectors for proper continuity.

4. What are some repair tips for resolving OBDII code B0238 Pontiac related to the Air Flow Control 1 Circuit?

Repair tips may include replacing the faulty air flow control actuator, repairing damaged wiring or connectors, or reprogramming the PCM if necessary.

5. Can I drive my Pontiac with OBDII code B0238 related to the Air Flow Control 1 Circuit?

It is not recommended to drive your vehicle with this code present, as it can lead to further engine damage and potential safety issues. It is best to address the issue promptly.

6. How much does it typically cost to repair OBDII code B0238 Pontiac for the Air Flow Control 1 Circuit?

The cost of repair can vary depending on the exact cause of the issue, but it may range from $100 to $500 or more, including parts and labor.

7. Are there any preventive measures to avoid OBDII code B0238 Pontiac for the Air Flow Control 1 Circuit?

Regular maintenance of your vehicle, including timely inspections and addressing any engine performance issues promptly, can help prevent this code from occurring.

8. Can a DIY enthusiast fix OBDII code B0238 Pontiac for the Air Flow Control 1 Circuit?

While some simple repairs like checking and cleaning connectors may be possible for a DIY enthusiast, diagnosing and repairing this code may require specialized tools and expertise, so it is recommended to consult a professional mechanic.

9. Is OBDII code B0238 Pontiac for the Air Flow Control 1 Circuit a common issue in Pontiac vehicles?

While not extremely common, this code can occur in Pontiac vehicles, especially in older models or those with high mileage. Regular maintenance can help prevent such issues.

10. How long does it take to repair OBDII code B0238 Pontiac for the Air Flow Control 1 Circuit?

The repair time can vary depending on the exact cause of the issue and the availability of parts, but it may take anywhere from a few hours to a full day to resolve this code.