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Engine-Codes – Generic – B3110

B3110 Code - Keyless Entry Transmitter 2 Battery

Quick Answer

The B3110 code refers to an issue with the Keyless Entry Transmitter 2 Battery in the vehicle. Common causes include Low battery in the keyless entry transmitter, Faulty keyless entry transmitter, Wiring issues in the keyless entry 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
B3110 indicates Keyless Entry Transmitter 2 Battery.
Common causes
Common causes include Low battery in the keyless entry transmitter, Faulty keyless entry transmitter, Wiring issues in the keyless entry 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 06, 2024
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Code B3110 Description

The B3110 code refers to an issue with the Keyless Entry Transmitter 2 Battery in the vehicle. This code indicates that there is a problem with the battery of the keyless entry transmitter, which is responsible for allowing the driver to remotely lock and unlock the car doors, as well as possibly control other functions such as the alarm system or trunk release. When this battery is low or failing, it can lead to issues with the keyless entry system not functioning properly, which can be inconvenient and potentially compromise the security of the vehicle.

OBDII Code B3110 - Keyless Entry Transmitter 2 Battery
B3110 Code - Keyless Entry Transmitter 2 Battery

Common Causes of B3110

  1. Low battery in the keyless entry transmitter.
  2. Faulty keyless entry transmitter.
  3. Wiring issues in the keyless entry system.
  4. Faulty receiver module in the vehicle.
  5. Interference from other electronic devices.

Symptoms of B3110

  1. Keyless entry system not responding to remote commands.
  2. Reduced range for keyless entry functionality.
  3. Intermittent operation of keyless entry system.
  4. Alarm system not arming/disarming properly.
  5. Inability to open the trunk remotely.

How to Fix B3110

  1. Replace the battery in the keyless entry transmitter.
  2. Check and repair any wiring issues in the keyless entry system.
  3. Replace the keyless entry transmitter if it is faulty.
  4. Test and potentially replace the receiver module in the vehicle.
  5. Ensure the keyless entry system is properly programmed and synced with the vehicle.

Cost to Fix B3110

The cost of repairing a Keyless Entry Transmitter 2 Battery issue can vary depending on the specific cause of the problem and the make and model of the vehicle. Generally, replacing the battery in the keyless entry transmitter can cost around $5 to $20 for the battery itself. If the issue is related to a faulty transmitter or receiver module, the cost can range from $50 to $200 for parts, with additional labor costs that may bring the total repair bill to $100 to $300 or more. It's important to factor in diagnostic fees, which can range from $50 to $150 depending on the shop and location.

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Code B3110 Information for Specific Makes

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 B3110 Code

1. What does the OBDII code B3110 mean?

The B3110 code indicates an issue with the battery in the second keyless entry transmitter, often due to low voltage or a dead battery.

2. What are the symptoms of the B3110 code?

Common symptoms include the second key fob not working to lock or unlock the vehicle, inconsistent response, or failure to start the car if it uses a push-button ignition.

3. What causes the B3110 code?

The most common cause is a depleted or faulty battery in the second keyless entry transmitter. Other causes could include a damaged key fob or interference with the keyless entry system.

4. How can I fix the B3110 code?

Replace the battery in the second keyless entry transmitter. Ensure you use the correct battery type specified by the manufacturer.

5. How do I know which battery to use for my keyless transmitter?

Check the owner's manual or inspect the current battery in the key fob for the correct size and type, commonly CR2032 or CR2025.

6. Can the B3110 code be triggered by anything other than the battery?

Yes, it can also be triggered by a damaged key fob, faulty receiver in the vehicle, or issues with the keyless entry system programming.

7. Do I need to reprogram my key fob after replacing the battery?

Typically, no reprogramming is needed after simply replacing the battery. However, if the fob still doesn't work, reprogramming may be required.

8. What tools do I need to replace the key fob battery?

You generally need a small flathead screwdriver or a similar tool to open the fob casing and the appropriate replacement battery.

9. Will the B3110 code clear itself after fixing the issue?

Yes, the code may clear itself after replacing the battery and cycling the ignition, but in some cases, you may need a scan tool to manually clear it.

10. Can I continue driving with the B3110 code active?

Yes, you can drive the vehicle, but the second key fob will remain inoperative until the issue is resolved, which may be inconvenient.

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