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Engine-Codes – GMC – B243B 2017 GMC Sierra

B243B 2017 GMC Sierra Code - Right Front Seat Heating Switch

Quick Answer

The B243B diagnostic trouble code (DTC) on a 2017 GMC Sierra specifically relates to the right front seat heating switch. Common causes include Faulty right front seat heating switch, Wiring issues or shorts in the seat heating circuit, Blown fuse related to the seat heating system. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means
B243B 2017 GMC Sierra indicates Right Front Seat Heating Switch.
Common causes
Common causes include Faulty right front seat heating switch, Wiring issues or shorts in the seat heating circuit, Blown fuse related to the seat heating system.
Severity
High - diagnose this code as soon as possible.
Can I drive?
Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
What is this?
Table of contents Created and updated by William Orellana on Sep 17, 2024
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Code B243B 2017 GMC Sierra Description

The B243B diagnostic trouble code (DTC) on a 2017 GMC Sierra specifically relates to the right front seat heating switch. This code indicates a problem with the circuit or operation of the right front seat heating switch, which controls the heating function of the seat. When this code is triggered, it means that the vehicle's onboard diagnostic system has detected an issue with the right front seat heating switch, potentially leading to a malfunction in the heating system.

OBDII Code B243B 2017 GMC Sierra - Right Front Seat Heating Switch
B243B 2017 GMC Sierra Code - Right Front Seat Heating Switch

Common Causes of B243B 2017 GMC Sierra

  1. Faulty right front seat heating switch
  2. Wiring issues or shorts in the seat heating circuit
  3. Blown fuse related to the seat heating system
  4. Defective seat heating element
  5. Electronic control module (ECM) malfunction

Symptoms of B243B 2017 GMC Sierra

  1. Inoperative right front seat heating function
  2. Erratic behavior of the seat heating switch
  3. Illumination of the seat heating indicator light on the dashboard
  4. Uneven heating distribution in the right front seat

How to Fix B243B 2017 GMC Sierra

  1. Begin by diagnosing the specific cause of the issue using a diagnostic scanner to retrieve the DTC and pinpoint the source of the problem.
  2. Inspect the right front seat heating switch for any visible damage or signs of malfunction. Replace the switch if necessary.
  3. Check the wiring and connections related to the seat heating system for any faults or shorts. Repair or replace damaged wiring as needed.
  4. Test the seat heating element for continuity and proper function. Replace the element if it is faulty.
  5. Clear the DTC from the vehicle's memory using the diagnostic scanner after completing the repairs to reset the system and ensure the issue has been resolved.

Cost to Fix B243B 2017 GMC Sierra

The typical repair costs for addressing the B243B code on a 2017 GMC Sierra can vary depending on the specific cause of the issue. In general, replacing the right front seat heating switch can cost between $100 and $200, while addressing wiring or fuse issues may range from $150 to $300. If the seat heating element needs to be replaced, the cost can be between $200 and $400. Labor rates at auto repair shops typically range from $80 to $150 per hour, so the total cost of repairs will depend on the time required to diagnose and fix the issue. It's recommended to consult with a professional mechanic to obtain an accurate estimate based on the specific circumstances of the vehicle.

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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 B243B 2017 GMC Sierra Code

1. What does the OBDII code B243B mean on a 2017 GMC Sierra?

The B243B code indicates an issue with the right front seat heating switch circuit, often related to electrical faults or component failure.

2. What are the symptoms of code B243B in a 2017 GMC Sierra?

Common symptoms include the right front seat heater not functioning, the heating switch being unresponsive, or intermittent operation of the seat heater.

3. What causes the B243B code to appear?

The code can be caused by a faulty seat heating switch, damaged wiring, poor electrical connections, or a malfunction in the seat control module.

4. Can I still drive my GMC Sierra with code B243B active?

Yes, the code does not affect drivability, but the right front seat heater may not work until the issue is resolved.

5. How do you diagnose the B243B code on a 2017 GMC Sierra?

Diagnosis typically involves checking the seat heating switch, inspecting the wiring and connectors for damage, and testing the seat control module for proper functionality.

6. How do you fix the B243B code on a GMC Sierra?

Repairs may include replacing the right front seat heating switch, repairing damaged wiring, cleaning or tightening electrical connections, or reprogramming the seat control module.

7. Is the B243B code specific to the right front seat?

Yes, this code specifically refers to the right front seat heating switch and does not affect other seat heaters.

8. Can a blown fuse cause the B243B code?

While a blown fuse could interrupt power to the seat heater system, the code specifically points to the heating switch circuit, so fuse-related issues are less common but worth checking.

9. How much does it cost to fix the B243B code on a 2017 GMC Sierra?

Repair costs can range from $50 to $300, depending on whether the issue is related to the switch, wiring, or control module.

10. Can I clear the B243B code without fixing the issue?

You can clear the code with an OBDII scanner, but it will likely return if the underlying issue is not addressed.

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