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B0338 Chevrolet Code - Inside Air Temperature Sensor Open

Quick Answer

The B0338 code for Chevrolet vehicles indicates that there is an issue with the inside air temperature sensor being open. Common causes include Faulty inside air temperature sensor, Wiring issues or loose connections in the sensor circuit, Corrosion or damage to the sensor connector. 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
B0338 Chevrolet indicates Inside Air Temperature Sensor Open.
Common causes
Common causes include Faulty inside air temperature sensor, Wiring issues or loose connections in the sensor circuit, Corrosion or damage to the sensor connector.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 11, 2024
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Code B0338 Chevrolet Description

The B0338 code for Chevrolet vehicles indicates that there is an issue with the inside air temperature sensor being open. The inside air temperature sensor is responsible for monitoring the temperature inside the vehicle's cabin. If the sensor is open, it means that there is an open circuit or a lack of communication between the sensor and the vehicle's computer system. This can lead to inaccurate temperature readings being sent to the HVAC system, resulting in improper climate control settings.

OBDII Code B0338 Chevrolet - Inside Air Temperature Sensor Open
B0338 Chevrolet Code - Inside Air Temperature Sensor Open

Common Causes of B0338 Chevrolet

  1. Faulty inside air temperature sensor
  2. Wiring issues or loose connections in the sensor circuit
  3. Corrosion or damage to the sensor connector
  4. Issues with the vehicle's computer system or HVAC control module
  5. Environmental factors such as extreme temperatures or moisture affecting the sensor

Symptoms of B0338 Chevrolet

  1. Inaccurate temperature readings on the climate control display
  2. HVAC system not responding to temperature adjustments
  3. Inconsistent heating or cooling inside the vehicle
  4. Climate control system blowing hot air when set to cool or vice versa
  5. Check engine light illuminated on the dashboard

How to Fix B0338 Chevrolet

  1. Begin by diagnosing the issue by using a scan tool to read the B0338 trouble code and determine the exact cause of the problem.
  2. Inspect the wiring and connections related to the inside air temperature sensor for any damage or corrosion. Repair or replace any damaged wiring or connectors.
  3. Test the inside air temperature sensor itself to ensure it is functioning correctly. Replace the sensor if it is found to be faulty.
  4. Clear the trouble code from the vehicle's computer system using the scan tool and test the HVAC system to ensure that the issue has been resolved.
  5. If the problem persists, further diagnostic testing may be needed to identify any underlying issues with the vehicle's computer system or HVAC control module.

Cost to Fix B0338 Chevrolet

The typical repair costs for addressing a B0338 code related to the inside air temperature sensor can range from $150 to $300, including parts and labor. However, it is important to note that specific diagnosis time and labor rates at auto repair shops can vary based on factors such as location, vehicle make and model, and engine type. It is advisable to check with local auto repair shops for a more accurate estimate based on the specific circumstances.

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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 B0338 Chevrolet Code

1. What are the common symptoms of OBDII code B0338 in a Chevrolet related to the Inside Air Temperature Sensor Open?

The common symptoms include inaccurate readings on the climate control system, inconsistent air conditioning performance, and the inability to adjust the interior temperature effectively.

2. What usually causes the Inside Air Temperature Sensor Open code B0338 in Chevrolet vehicles?

The code B0338 is typically triggered by a faulty inside air temperature sensor, a damaged wiring harness, or a poor electrical connection.

3. How can I diagnose the Inside Air Temperature Sensor Open issue in my Chevrolet?

You can diagnose the issue by visually inspecting the sensor and its wiring for any visible damage. Using a multimeter, you can also test the sensor's resistance to determine if it is within the specified range.

4. What are some DIY repair tips for resolving the B0338 code in a Chevrolet?

DIY repair tips include checking and repairing any damaged wiring, replacing the inside air temperature sensor if it is faulty, and ensuring all electrical connections are secure.

5. Can I continue driving my Chevrolet with the B0338 OBDII code present?

While it may be possible to continue driving your Chevrolet with the B0338 code, it is recommended to address the issue promptly to prevent further complications with the climate control system.

6. Is it essential to reset the OBDII code B0338 after repairing the issue in a Chevrolet?

Yes, it is important to reset the code using an OBDII scanner after resolving the underlying problem. This will clear the error code and ensure the issue has been successfully addressed.

7. How much does it typically cost to repair the Inside Air Temperature Sensor Open code B0338 in a Chevrolet?

The cost of repairing the B0338 code can vary depending on the extent of the issue and whether you choose to DIY or seek professional help. It may involve minimal costs for sensor replacement or wiring repairs.

8. Will the Inside Air Temperature Sensor Open code B0338 affect my Chevrolet's overall performance?

While the B0338 code is related to the climate control system, it may not significantly impact the overall performance of your Chevrolet. However, addressing the issue promptly is recommended to maintain optimal comfort levels inside the vehicle.

9. Can extreme temperatures or weather conditions trigger the B0338 OBDII code in a Chevrolet?

Extreme temperatures or weather conditions are unlikely to directly trigger the B0338 code. However, prolonged exposure to extreme conditions could potentially cause sensor or wiring damage over time.

10. Are there any preventive measures I can take to avoid encountering the B0338 OBDII code in my Chevrolet?

Regularly inspecting the climate control system, ensuring proper maintenance of the inside air temperature sensor, and addressing any electrical issues promptly can help prevent the occurrence of the B0338 code in your Chevrolet.

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