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Engine-Codes – Chevrolet – B191A 2018 Chevrolet Silverado

B191A 2018 Chevrolet Silverado Code - Front Heated Seat Module

Quick Answer

The B191A diagnostic trouble code (DTC) specifically pertains to the Front Heated Seat Module in the 2018 Chevrolet Silverado. Common causes include Faulty front heated seat module, Damaged wiring or connectors leading to the heated seat system, Short circuit or open circuit within the heated seat circuit. 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
B191A 2018 Chevrolet Silverado indicates Front Heated Seat Module.
Common causes
Common causes include Faulty front heated seat module, Damaged wiring or connectors leading to the heated seat system, Short circuit or open circuit within the heated seat circuit.
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 Oct 09, 2024
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Code B191A 2018 Chevrolet Silverado Description

The B191A diagnostic trouble code (DTC) specifically pertains to the Front Heated Seat Module in the 2018 Chevrolet Silverado. This code indicates that there is an issue within the heated seat system, which may involve the module itself or its associated components. The heated seat module is responsible for regulating the temperature of the seat heaters, providing comfort to the occupants during colder weather. When the module detects a malfunction, it triggers the B191A code, which may lead to the heated seats becoming inoperative.

OBDII Code B191A 2018 Chevrolet Silverado - Front Heated Seat Module
B191A 2018 Chevrolet Silverado Code - Front Heated Seat Module

Common Causes of B191A 2018 Chevrolet Silverado

  1. Faulty front heated seat module.
  2. Damaged wiring or connectors leading to the heated seat system.
  3. Short circuit or open circuit within the heated seat circuit.
  4. Malfunctioning seat heater elements.
  5. Issues with the body control module (BCM) affecting communication with the heated seat module.

Symptoms of B191A 2018 Chevrolet Silverado

  1. Heated seats do not activate or provide heat.
  2. Fluctuating temperatures from the heated seats, indicating inconsistent performance.
  3. Warning lights on the dashboard related to the heated seat system.
  4. Unusual noises or clicking sounds coming from the seat area when attempting to activate the heaters.
  5. Possible overheating of the seat elements, leading to a burning smell or discomfort.

How to Fix B191A 2018 Chevrolet Silverado

  1. Diagnostic Scan: Begin by using an OBD-II scanner to confirm the B191A code and check for any additional codes that may provide more context regarding the issue.
  2. Visual Inspection: Inspect the wiring harness and connectors associated with the heated seat module for any signs of damage, corrosion, or loose connections.
  3. Module Testing: Test the front heated seat module for functionality using a multimeter to check for proper voltage and continuity.
  4. Replace Components: If the module or seat heater elements are found to be faulty, replace them with OEM or high-quality aftermarket parts.
  5. Clear Codes and Test: After repairs, clear the diagnostic codes and conduct a test to ensure that the heated seats are functioning correctly and that the B191A code does not reappear.

Cost to Fix B191A 2018 Chevrolet Silverado

The typical repair costs for addressing the B191A code can vary significantly based on the specific diagnosis and repairs needed. On average, you might expect to pay between $200 to $600 for parts and labor. This estimate includes the cost of a new heated seat module, which can range from $150 to $400, and labor costs, which typically range from $80 to $150 per hour. It is important to note that labor rates can vary based on location, vehicle make and model, and engine type. In metropolitan areas or at dealerships, rates may be higher, while independent shops often offer more competitive pricing. Therefore, it is advisable to check local rates for a more precise estimate tailored to your specific situation.

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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 B191A 2018 Chevrolet Silverado Code

1. What does OBDII code B191A mean on a 2018 Chevrolet Silverado?

Code B191A indicates a fault in the Front Heated Seat Module, typically related to communication or performance issues within the module or its associated circuits.

2. What are common symptoms of the B191A code in a 2018 Chevrolet Silverado?

Symptoms may include the front heated seats not functioning, an illuminated seat heater indicator that turns off quickly, or no response when attempting to activate the heated seat feature.

3. What causes the B191A code to appear in a Chevrolet Silverado?

The code can be caused by a faulty Front Heated Seat Module, damaged wiring or connectors, a blown fuse, or a software issue within the vehicle's control systems.

4. Can the B191A code cause any safety concerns in the vehicle?

No, the B191A code does not pose a safety risk, but it will prevent the heated seats from working, which could reduce comfort in colder weather.

5. How can I diagnose the B191A code in my 2018 Chevrolet Silverado?

Start by inspecting the wiring and connectors for the Front Heated Seat Module. Use a scan tool to verify the code and check for related codes. Testing the module's power supply and ground connections is also recommended.

6. Can the B191A code be fixed without replacing the Front Heated Seat Module?

Yes, if the issue is due to damaged wiring, loose connectors, or a blown fuse, repairing or replacing these components may resolve the code without needing to replace the module.

7. How much does it cost to repair the B191A code on a Chevrolet Silverado?

The cost can vary depending on the cause. Simple wiring repairs or fuse replacements may cost under $100, while module replacement can range from $300 to $600, including parts and labor.

8. Can I clear the B191A code without fixing the issue?

You can clear the code using an OBDII scan tool, but it will likely return if the underlying problem is not addressed.

9. Is it safe to drive with the B191A code active?

Yes, the vehicle is safe to drive, but the heated seat functionality will not work until the issue is resolved.

10. Do I need a professional mechanic to fix the B191A code?

If you're comfortable with basic electrical diagnostics and repairs, you may be able to fix the issue yourself. However, for complex problems or module replacement, seeking professional help is recommended.

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