AutoCodes – Generic – B3111

B3111 Code - Keyless Entry Transmitter 3 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: B3111 indicates Keyless Entry Transmitter 3 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 5,755

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 B3111 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 B3111 - Keyless Entry Transmitter 3 Battery - AutoCodes.com — B3111 Code - Keyless Entry Transmitter 3 Battery

What does this mean?

What are the Possible Causes of the DTC B3111?

Low Keyless Entry Transmitter Battery
Faulty Keyless Entry Transmitter

How to Fix the DTC B3111?

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 B3111 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 B3111 code?

Need more information on how to fix the B3111 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B3111 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

B3111 Buick — Keyless Entry Transmitter 3 Battery
B3111 Cadillac — Keyless Entry Transmitter 3 Battery
B3111 Chevrolet — Keyless Entry Transmitter 3 Battery
B3111 GMC — Keyless Entry Transmitter 3 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 B3111 Code

1. What are common symptoms of OBDII code B3111 (Keyless Entry Transmitter 3 Battery)?

- Common symptoms include malfunctioning keyless entry system, weak or no response from the remote transmitter, and difficulty locking or unlocking the vehicle.

2. What are the possible causes of OBDII code B3111?

- The code B3111 is typically triggered by a low or depleted battery in the keyless entry transmitter, wiring issues, or a faulty key fob.

3. How can I diagnose OBDII code B3111 related to the Keyless Entry Transmitter 3 Battery?

- You can diagnose this code by checking the battery level in the key fob, inspecting the wiring for any damage, and testing the key fob's functionality using a diagnostic tool.

4. Can a weak keyless entry transmitter battery cause code B3111?

- Yes, a weak keyless entry transmitter battery can trigger code B3111 as it affects the proper functioning of the key fob.

5. How can I repair OBDII code B3111 related to the Keyless Entry Transmitter 3 Battery?

- To repair this code, you can start by replacing the battery in the key fob, ensuring proper connection and wiring, and reprogramming the key fob if necessary.

6. Will replacing the keyless entry transmitter battery clear the B3111 code?

- Replacing the keyless entry transmitter battery may resolve the issue causing the B3111 code, but you may need to clear the code using a diagnostic tool.

7. Can a faulty key fob trigger code B3111 even with a good battery?

- Yes, a faulty key fob can still trigger code B3111 even if the battery is in good condition due to internal issues within the transmitter.

8. Is it possible to reset the keyless entry system to clear code B3111?

- Resetting the keyless entry system may help clear the B3111 code, but it's important to address the root cause, such as a weak battery or wiring issue.

9. Can a damaged wiring harness cause OBDII code B3111?

- Yes, a damaged wiring harness can cause OBDII code B3111 as it can lead to poor connectivity between the keyless entry transmitter and the vehicle's system.

10. How important is it to address OBDII code B3111 promptly?

- It is important to address OBDII code B3111 promptly as it can affect the convenience and security features of the keyless entry system in your vehicle.