B3109 2018 Chevrolet Silverado Code - Keyless Entry Transmitter 1 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
- B3109 2018 Chevrolet Silverado indicates Keyless Entry Transmitter 1 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 B3109 2018 Chevrolet Silverado Description
What are the Possible Causes of the DTC B3109 2018 Chevrolet Silverado?
- Low Keyless Entry Transmitter Battery
- Faulty Keyless Entry Transmitter
How to Fix the DTC B3109 2018 Chevrolet Silverado?
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 B3109 2018 Chevrolet Silverado 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 B3109 2018 Chevrolet Silverado Code
1. What does the OBDII code B3109 mean on a 2018 Chevrolet Silverado?
The code B3109 indicates an issue with the Keyless Entry Transmitter 1 Battery, typically related to the first key fob's low or depleted battery.
2. What are the symptoms of code B3109 in a 2018 Chevrolet Silverado?
Symptoms may include the key fob not working to unlock or lock the doors, difficulty starting the vehicle if equipped with push-button start, or a dashboard warning about the key fob battery.
3. What causes the B3109 code to appear?
The primary cause is a low or dead battery in Keyless Entry Transmitter 1, but it could also be due to poor connections or a malfunctioning key fob.
4. How do I fix the B3109 code on my 2018 Chevrolet Silverado?
Replace the battery in Keyless Entry Transmitter 1 with a new one. Ensure the battery is installed correctly and that the key fob contacts are clean.
5. What type of battery does the key fob for a 2018 Chevrolet Silverado use?
The key fob typically uses a CR2032 coin cell battery, but you should verify this in your owner’s manual.
6. Can I clear the B3109 code without replacing the battery?
The code may temporarily clear if the key fob regains some functionality, but it will likely return until the battery is replaced.
7. How do I know if the issue is with the key fob or the vehicle?
Test the key fob after replacing the battery. If it still does not work, there could be an issue with the fob itself or the vehicle’s keyless entry system.
8. How often should I replace the key fob battery in my 2018 Chevrolet Silverado?
Key fob batteries typically last 1-2 years, depending on use. Replace it when you notice reduced range or functionality.
9. Can a weak key fob battery affect the vehicle’s push-button start system?
Yes, a weak key fob battery can prevent the vehicle from detecting the key fob, causing issues with starting the engine.
10. Do I need to reprogram the key fob after replacing the battery?
No, the key fob does not usually need reprogramming after a battery replacement, as long as the battery is installed correctly.
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