AutoCodes – Cadillac – B3122 Cadillac

B3122 Cadillac Code - Keyless Entry Antenna 4

Quick Answer

The front center console antenna is located in front of the center console assembly and is used to establish low frequency communications with the keyless entry transmitter. Common causes include Faulty Keyless Entry Antenna Center Console Front, Keyless Entry Antenna Center Console Front harness is open or shorted, Keyless Entry Antenna Center Console Front 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: B3122 Cadillac indicates Keyless Entry Antenna 4.
Common causes: Common causes include Faulty Keyless Entry Antenna Center Console Front, Keyless Entry Antenna Center Console Front harness is open or shorted, Keyless Entry Antenna Center Console Front 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 1,389

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 B3122 Cadillac Description

The front center console antenna is located in front of the center console assembly and is used to establish low frequency communications with the keyless entry transmitter. When the driver attempts to change the ignition status of the vehicle, the Keyless Entry Control Module communicates with the front center console antenna. The Diagnostic Trouble Code (DTC) sets when the keyless entry control module detects a short to ground on the front center console keyless entry antenna signal circuit.

OBDII Code B3122 Cadillac - Keyless Entry Antenna 4 - AutoCodes.com — B3122 Cadillac Code - Keyless Entry Antenna 4

What does this mean?

What are the Possible Causes of the DTC B3122 Cadillac?

Faulty Keyless Entry Antenna Center Console Front
Keyless Entry Antenna Center Console Front harness is open or shorted
Keyless Entry Antenna Center Console Front circuit poor electrical connection
Faulty Keyless Entry Control Module

How to Fix the DTC B3122 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 B3122 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 B3122 Cadillac Code

1. What does the OBDII code B3122 mean on a Cadillac?

B3122 indicates an issue with the Keyless Entry Antenna 4, which is part of the vehicle's keyless entry system. It typically signals a malfunction in the communication or signal strength from the antenna.

2. What are the common symptoms of code B3122 on a Cadillac?

Symptoms include difficulty unlocking or locking the doors using the key fob, reduced remote range, or complete failure of the keyless entry system.

3. What causes the B3122 code to appear on a Cadillac?

Common causes include a damaged or disconnected Keyless Entry Antenna 4, wiring issues such as corrosion or a break in the circuit, or, less commonly, a problem with the keyless entry control module.

4. Can a weak key fob battery trigger code B3122 on a Cadillac?

No, a weak key fob battery will not directly trigger B3122. However, it can cause similar symptoms, so it's good to check the fob battery first before diagnosing antenna issues.

5. How do I diagnose the root cause of code B3122 on a Cadillac?

Start by visually inspecting Keyless Entry Antenna 4 and its wiring for damage or corrosion. Use a scan tool to verify the fault and check for related codes. If necessary, test the antenna's signal strength and continuity.

6. Where is Keyless Entry Antenna 4 located on a Cadillac?

The location of Keyless Entry Antenna 4 varies by model but is often found near the rear of the vehicle, such as in the trunk or near the rear bumper.

7. Can a software issue cause the B3122 code on a Cadillac?

While rare, a software glitch in the keyless entry control module could potentially contribute to the code. Updating or reprogramming the module may resolve the issue if no hardware faults are found.

8. How do I fix the B3122 code on a Cadillac?

Repairs may include replacing or reconnecting the Keyless Entry Antenna 4, repairing damaged wiring, or replacing the keyless entry control module if itâ€™s defective.

9. Is it safe to drive with the B3122 code on a Cadillac?

Yes, the issue is not safety-critical. However, the keyless entry system may not function properly, which could be inconvenient.

10. How much does it cost to repair a B3122 code on a Cadillac?

Repair costs vary depending on the issue. Replacing the antenna may cost $100â€“$300, while wiring repairs or module replacement could increase the cost. Labor rates will also vary by location.