B3109 2017 GMC Sierra 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 2017 GMC Sierra 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 2017 GMC Sierra Description
What are the Possible Causes of the DTC B3109 2017 GMC Sierra?
- Low Keyless Entry Transmitter Battery
- Faulty Keyless Entry Transmitter
How to Fix the DTC B3109 2017 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 B3109 2017 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.
Need more information about the B3109 2017 GMC Sierra code?
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Frequently Asked Questions about B3109 2017 GMC Sierra Code
What does OBDII code B3109 mean for a 2017 GMC Sierra?
Code B3109 indicates an issue with the battery in Keyless Entry Transmitter 1, commonly related to low voltage or failure.
What are the symptoms of code B3109 in a 2017 GMC Sierra?
Symptoms may include difficulty unlocking/locking doors, failure to start the truck remotely, or reduced range of the key fob.
What causes code B3109 in a 2017 GMC Sierra?
The most common cause is a weak or dead battery in Keyless Entry Transmitter 1. Other causes may include damage to the key fob or issues with the vehicle's receiver module.
How do you fix code B3109 in a 2017 GMC Sierra?
Replace the battery in Keyless Entry Transmitter 1 with a new one. If issues persist, inspect the key fob for physical damage or reprogram it.
How do you replace the battery in Keyless Entry Transmitter 1?
Open the key fob by gently prying it apart, remove the old battery, and replace it with a compatible battery, typically a CR2032 or CR2025.
Can code B3109 affect vehicle performance?
This code does not affect engine or driving performance but may prevent remote functions like unlocking doors or remote start.
How do you clear code B3109 after fixing the issue?
Code B3109 usually clears automatically after replacing the battery. If not, use an OBDII scanner to clear the code manually.
How often should you replace the key fob battery in a 2017 GMC Sierra?
Typically, key fob batteries last 1-3 years, depending on usage. Replace the battery if you notice reduced range or inconsistent functionality.
What happens if the key fob is damaged while replacing the battery?
If the key fob is damaged, it may need to be replaced or reprogrammed by a dealership or qualified technician.
Can a faulty receiver module cause code B3109?
Yes, a malfunctioning receiver module in the vehicle could prevent communication with the key fob, but this is less common than a weak battery.
Discuss the causes and fixes for B3109 2017 GMC Sierra OBDII Code
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