B3111 Buick 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 Buick 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.
Code B3111 Buick Description
What are the Possible Causes of the DTC B3111 Buick?
- Low Keyless Entry Transmitter Battery
- Faulty Keyless Entry Transmitter
How to Fix the DTC B3111 Buick?
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 Buick 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.
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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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