AutoCodes – Generic – B3110

B3110 Code - Keyless Entry Transmitter 2 Battery

Quick Answer

With each press of a keyless entry transmitter button, a message containing the current battery state of the transmitter is sent to the Remote Control Door Lock Receiver (RCDLR), along with the commanded keyless entry function. Common causes include Low Keyless Entry Transmitter Battery, Faulty Keyless Entry Transmitter. 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 Keyless Entry Transmitter Battery, Faulty Keyless Entry Transmitter.
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.

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Code Popularity 12,246

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jun 11, 2023

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B3110 Description

With each press of a keyless entry transmitter button, a message containing the current battery state of the transmitter is sent to the Remote Control Door Lock Receiver (RCDLR), along with the commanded keyless entry function. The Remote Control Door Lock Receiver sends this to the Body Control Module (BCM) to perform the requested function. The Diagnostic Trouble Code (DTC) sets when three consecutive low-battery signals are received from the same transmitter.

OBDII Code B3110 - Keyless Entry Transmitter 2 Battery - AutoCodes.com — B3110 Code - Keyless Entry Transmitter 2 Battery

What does this mean?

What are the Possible Causes of the DTC B3110?

Low Keyless Entry Transmitter Battery
Faulty Keyless Entry Transmitter

How to Fix the DTC B3110?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B3110 code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the B3110 code?

Need more information on how to fix the B3110 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B3110 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

B3110 Buick — Keyless Entry Transmitter 2 Battery
B3110 Cadillac — Keyless Entry Transmitter 2 Battery
B3110 Chevrolet — Keyless Entry Transmitter 2 Battery
B3110 GMC — Keyless Entry Transmitter 2 Battery

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.