AutoCodes – Cadillac – B3119 Cadillac

B3119 Cadillac Code - Keyless Entry Antenna 1

Quick Answer

The driver door handle antenna is located in the driver door handle assembly and is used to establish low frequency communications with the keyless entry transmitter. Common causes include Faulty Handle Assembly Driver Exterior, Handle Assembly Driver Exterior harness is open or shorted, Handle Assembly Driver Exterior 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: B3119 Cadillac indicates Keyless Entry Antenna 1.
Common causes: Common causes include Faulty Handle Assembly Driver Exterior, Handle Assembly Driver Exterior harness is open or shorted, Handle Assembly Driver Exterior 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.

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Code Popularity 3,599

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Mar 03, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B3119 Cadillac Description

The driver door handle antenna is located in the driver door handle assembly and is used to establish low frequency communications with the keyless entry transmitter. As a vehicle with locked doors is approached with a keyless entry transmitter and the exterior door handle button is pressed, the Keyless Entry Control Module communicates with the driver door handle keyless entry antenna. The Diagnostic Trouble Code (DTC) sets when the exterior driver door handle button is pressed within 15 min of last door closing.

OBDII Code B3119 Cadillac - Keyless Entry Antenna 1 - AutoCodes.com — B3119 Cadillac Code - Keyless Entry Antenna 1

What does this mean?

What are the Possible Causes of the DTC B3119 Cadillac?

Faulty Handle Assembly Driver Exterior
Handle Assembly Driver Exterior harness is open or shorted
Handle Assembly Driver Exterior circuit poor electrical connection
Faulty Keyless Entry Control Module

How to Fix the DTC B3119 Cadillac?

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 B3119 Cadillac 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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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about B3119 Cadillac Code

1. What does the OBDII code B3119 mean on a Cadillac?

The B3119 code indicates an issue with Keyless Entry Antenna 1, which is responsible for communicating with the key fob for locking, unlocking, or starting the vehicle.

2. What are the common symptoms of code B3119 on a Cadillac?

Symptoms may include the key fob not working within its normal range, difficulty unlocking or locking the doors, or failure to start the vehicle using the keyless start system.

3. What causes the B3119 code to appear?

The code can be triggered by a faulty keyless entry antenna, damaged wiring or connectors, interference from external electronic devices, or a malfunctioning key fob.

4. Can a weak key fob battery cause the B3119 code?

No, a weak key fob battery typically doesnâ€™t trigger the B3119 code, but it can cause similar symptoms. Itâ€™s a good idea to check and replace the key fob battery first to rule it out.

5. How do you diagnose the B3119 code on a Cadillac?

Diagnosis involves using a scan tool to confirm the code, inspecting the keyless entry antenna and its wiring for damage, and testing the antenna for proper operation using specialized equipment.

6. How do you fix the B3119 code on a Cadillac?

Repairs may include replacing the faulty keyless entry antenna, repairing damaged wiring or connectors, or addressing any external interference affecting the system.

7. Where is Keyless Entry Antenna 1 located on a Cadillac?

The location of Keyless Entry Antenna 1 varies by model, but itâ€™s commonly found near the interior of the vehicle, such as under the dashboard, in the center console, or near the rear of the vehicle.

8. Can the B3119 code be cleared without repairs?

Clearing the code with a scan tool will temporarily remove it, but if the underlying issue isnâ€™t fixed, the code will return as soon as the fault is detected again.

9. Is it safe to drive with the B3119 code on a Cadillac?

Yes, the vehicle should still be drivable, but keyless entry and start features may not work properly, which could be inconvenient or leave you stranded if the issue worsens.

10. Can interference from other electronic devices cause the B3119 code?

Yes, electromagnetic interference from devices like cell phones, wireless chargers, or other electronics can sometimes disrupt the keyless entry system and contribute to the issue.