B3112 2018 GMC Sierra Code - Keyless Entry Transmitter 4 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
- B3112 2018 GMC Sierra indicates Keyless Entry Transmitter 4 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 B3112 2018 GMC Sierra Description
What are the Possible Causes of the DTC B3112 2018 GMC Sierra?
- Low Keyless Entry Transmitter Battery
- Faulty Keyless Entry Transmitter
How to Fix the DTC B3112 2018 GMC Sierra?
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 B3112 2018 GMC Sierra 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 B3112 2018 GMC Sierra Code
1. What does the OBDII code B3112 mean on a 2018 GMC Sierra?
The code B3112 indicates an issue with the battery in the Keyless Entry Transmitter 4, usually related to low voltage or a malfunction.
2. What are the symptoms of code B3112 in a 2018 GMC Sierra?
Common symptoms include the fourth key fob not working, intermittent signal issues, or the inability to lock/unlock the vehicle using that transmitter.
3. What causes the B3112 code to appear?
The most common cause is a low or dead battery in Keyless Entry Transmitter 4. Other possible causes include a damaged key fob or communication issues between the fob and the vehicle.
4. How can I fix the B3112 code on my GMC Sierra?
Replacing the battery in Keyless Entry Transmitter 4 usually resolves the issue. If the problem persists, check the fob for physical damage or consult a technician.
5. How do I replace the battery in Keyless Entry Transmitter 4?
Open the key fob case, remove the old battery, and replace it with a new CR2032 or CR2025 battery, depending on your fob model. Ensure the battery is installed with the correct polarity.
6. Can I clear the B3112 code without repairing the key fob?
Clearing the code without addressing the issue will result in the code returning. Ensure the fob is functioning properly before clearing the code with a scan tool.
7. How do I know if the problem is with the key fob or the vehicle?
Test the fourth key fob after replacing the battery. If it still doesn’t work, try reprogramming the fob or using another fob to determine if the issue lies within the vehicle's receiver.
8. What type of battery does the 2018 GMC Sierra key fob use?
The key fob typically uses a CR2032 or CR2025 coin cell battery, depending on the model.
9. Do all key fobs need to be reprogrammed after replacing the battery?
No, most key fobs retain their programming after a battery replacement. However, if the fob doesn’t work, reprogramming may be required.
10. Can a dealership fix the B3112 code on my GMC Sierra?
Yes, a dealership can diagnose and repair the issue, including replacing the battery, reprogramming the key fob, or addressing receiver malfunctions.
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