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B3111 Buick Code - Keyless Entry Transmitter 3 Battery

Quick Answer

The B3111 Buick code refers to an issue with the keyless entry transmitter 3 battery. Common causes include Normal wear and tear on the keyless entry transmitter battery, Faulty keyless entry transmitter, Environmental factors such as extreme temperatures affecting the battery. 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
B3111 Buick indicates Keyless Entry Transmitter 3 Battery.
Common causes
Common causes include Normal wear and tear on the keyless entry transmitter battery, Faulty keyless entry transmitter, Environmental factors such as extreme temperatures affecting the battery.
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 10, 2024
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Code B3111 Buick Description

The B3111 Buick code refers to an issue with the keyless entry transmitter 3 battery. Keyless entry systems have become a common feature in modern vehicles, allowing drivers to unlock and start their cars without physically inserting a key. The keyless entry transmitter is a small device that sends signals to the vehicle's receiver, allowing the doors to be unlocked and the engine to be started.

OBDII Code B3111 Buick - Keyless Entry Transmitter 3 Battery
B3111 Buick Code - Keyless Entry Transmitter 3 Battery

Common Causes of B3111 Buick

  1. Normal wear and tear on the keyless entry transmitter battery
  2. Faulty keyless entry transmitter
  3. Environmental factors such as extreme temperatures affecting the battery
  4. Electrical issues within the keyless entry system
  5. Corrosion or damage to the keyless entry transmitter contacts

Symptoms of B3111 Buick

  1. Difficulty unlocking or locking the doors remotely
  2. Inability to start the vehicle using the keyless entry system
  3. Keyless entry system not responding to button presses
  4. Warning light on the dashboard indicating a keyless entry system fault

How to Fix B3111 Buick

  1. Locate the keyless entry transmitter 3 on your key fob.
  2. Use a small screwdriver to open the key fob and access the battery.
  3. Replace the old battery with a new CR2032 battery, ensuring the polarity is correct.
  4. Close the key fob and test the keyless entry system to ensure it is working properly.
  5. If the issue persists, consider replacing the keyless entry transmitter or consulting a professional for further diagnosis.

Cost to Fix B3111 Buick

The cost of replacing the keyless entry transmitter 3 battery is relatively low, usually ranging from $5 to $20 for the battery itself. If the keyless entry transmitter needs to be replaced, the cost can vary depending on the make and model of the vehicle, but it typically ranges from $50 to $200 for the part. Labor costs for this repair are minimal since it can often be done quickly and easily by the vehicle owner. However, if professional help is needed, labor rates at auto repair shops can range from $80 to $150 per hour. It's best to check with local shops for a more accurate estimate based on 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 B3111 Buick Code

1. What does the OBDII code B3111 mean on a Buick?

It indicates an issue with the battery in the third keyless entry transmitter, such as a low or dead battery.

2. What are the common symptoms of the B3111 code?

Symptoms include the third key fob not working, failure to lock/unlock doors, or the vehicle not recognizing the keyless transmitter.

3. What causes the B3111 code to appear?

The most common cause is a weak or depleted battery in the third keyless entry transmitter.

4. How can I fix the B3111 code on my Buick?

Replace the battery in the third keyless entry transmitter with a new one and test its functionality.

5. What type of battery does a Buick keyless transmitter typically use?

Most Buick key fobs use a CR2032 or similar coin cell battery. Check your owner’s manual for confirmation.

6. Can I continue driving with the B3111 code active?

Yes, but the third key fob will not function until the issue is resolved, which could be inconvenient.

7. How do I clear the B3111 code after fixing the issue?

After replacing the key fob battery, the code should clear automatically. If not, you may need a scan tool to clear it manually.

8. Can the B3111 code be triggered by something other than a dead battery?

Yes, it could also be caused by a faulty key fob, damaged transmitter circuitry, or interference with the signal.

9. How do I know which key fob is the third transmitter?

Refer to your vehicle’s settings or a diagnostic scan tool that identifies the specific transmitter associated with the code.

10. What should I do if replacing the battery doesn’t fix the B3111 code?

Inspect the key fob for damage, reprogram it if necessary, or consult a professional to diagnose potential issues with the transmitter or vehicle system.

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