AutoCodes – Saturn – B0238 Saturn

B0238 Saturn 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 Saturn 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 1,212

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

What does this mean?

What are the Possible Causes of the DTC B0238 Saturn?

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 Saturn?

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 Saturn 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 Saturn code?

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

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 Saturn Code

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

- Common symptoms include poor engine performance, rough idling, stalling, and increased fuel consumption.

2. What are some possible causes of OBDII code B0238 in a Saturn?

- Possible causes may include a faulty air flow control solenoid, damaged wiring or connectors, or a problem with the air flow control circuit.

3. How can I diagnose the issue causing OBDII code B0238 in my Saturn?

- You can diagnose the issue by conducting a thorough visual inspection of the wiring and connectors, testing the air flow control solenoid, and using a scan tool to monitor the circuit operation.

4. What are some repair tips for addressing OBDII code B0238 in a Saturn?

- Repair tips may include checking and repairing any damaged wiring or connectors, replacing the air flow control solenoid if necessary, and clearing the code to see if it returns.

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

- It is not recommended to drive your Saturn with this code as it can lead to further engine damage and potential safety hazards.

6. How serious is OBDII code B0238 in a Saturn?

- This code should be addressed promptly as it can cause drivability issues and impact the overall performance of your vehicle.

7. How much does it typically cost to repair OBDII code B0238 in a Saturn?

- The cost of repair can vary depending on the exact cause of the issue, but it may range from $100 to $300 for parts and labor.

8. Can I reset OBDII code B0238 in my Saturn without fixing the underlying issue?

- While you can clear the code temporarily, it is important to address the root cause to prevent the code from reappearing.

9. Will OBDII code B0238 cause my Saturn to fail an emissions test?

- Yes, this code can cause your Saturn to fail an emissions test due to its impact on engine performance and emissions control.

10. Is it possible to prevent OBDII code B0238 in a Saturn?

- Regular maintenance, such as checking and replacing air flow control components as needed, can help prevent the occurrence of this code in your Saturn.