B3120 Chevrolet Code - Keyless Entry Antenna 2
Quick Answer
The passenger front door handle antenna is located in the passenger front door handle assembly and is used to establish low frequency communications with the keyless entry transmitter. Common causes include Faulty Passenger Exterior Door Handle Assembly, Passenger Exterior Door Handle Assembly harness is open or shorted, Passenger Exterior Door Handle Assembly circuit poor electrical connection. 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
- B3120 Chevrolet indicates Keyless Entry Antenna 2.
- Common causes
- Common causes include Faulty Passenger Exterior Door Handle Assembly, Passenger Exterior Door Handle Assembly harness is open or shorted, Passenger Exterior Door Handle Assembly circuit poor electrical connection.
- 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 B3120 Chevrolet Description
What are the Possible Causes of the DTC B3120 Chevrolet?
- Faulty Passenger Exterior Door Handle Assembly
- Passenger Exterior Door Handle Assembly harness is open or shorted
- Passenger Exterior Door Handle Assembly circuit poor electrical connection
- Faulty Keyless Entry Control Module
How to Fix the DTC B3120 Chevrolet?
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 B3120 Chevrolet 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 B3120 Chevrolet Code
1. What does the OBDII code B3120 mean on a Chevrolet?
The code B3120 indicates an issue with the Keyless Entry Antenna 2, which may be malfunctioning or not transmitting/receiving signals correctly.
2. What are the symptoms of a B3120 code on a Chevrolet?
Symptoms may include a non-functional keyless entry system, intermittent operation of the remote, or difficulty locking/unlocking the vehicle using the key fob.
3. What causes the B3120 code to appear on a Chevrolet?
Common causes include a damaged or disconnected Keyless Entry Antenna 2, wiring issues, corrosion on connectors, or a malfunctioning key fob.
4. How do I diagnose a B3120 code on my Chevrolet?
Start by inspecting the Keyless Entry Antenna 2 for physical damage or disconnections, checking the wiring harness and connectors, and testing the key fob's signal output.
5. Can a weak battery in the key fob cause the B3120 code?
While a weak key fob battery can cause keyless entry issues, it is not the direct cause of the B3120 code, which specifically relates to the antenna.
6. Where is Keyless Entry Antenna 2 located on a Chevrolet?
The exact location varies by model, but Keyless Entry Antenna 2 is often located near the rear of the vehicle, such as in the trunk or near the rear bumper.
7. How do I fix a B3120 code on a Chevrolet?
Repairs may involve replacing the faulty Keyless Entry Antenna 2, repairing damaged wiring, cleaning corroded connectors, or reprogramming the keyless entry system.
8. Can I drive my Chevrolet with a B3120 code active?
Yes, the vehicle is still drivable, but the keyless entry system may not function properly, which can be inconvenient.
9. How much does it cost to fix a B3120 code on a Chevrolet?
Repair costs can vary but typically range from $100 to $300, depending on whether the antenna needs replacement and the labor involved.
10. Do I need to reprogram my key fob after fixing a B3120 code?
Reprogramming may not always be necessary, but if the code persists after repairs, reprogramming the key fob and system might help resolve the issue.
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