AutoCodes – Generic – B2103

B2103 Code - Antenna Not Connected

Quick Answer

The Passive Anti-Theft System (PATS) transceiver reads the PATS key when the key is turned to the START or ON position. Common causes include Faulty Passive Anti-Theft System (PATS) Transceiver Antenna, Disconnected Passive Anti-Theft System (PATS) Transceiver, Faulty Passive Anti-Theft System (PATS) Transceiver. 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: B2103 indicates Antenna Not Connected.
Common causes: Common causes include Faulty Passive Anti-Theft System (PATS) Transceiver Antenna, Disconnected Passive Anti-Theft System (PATS) Transceiver, Faulty Passive Anti-Theft System (PATS) Transceiver.
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 27,661

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 Sep 17, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B2103 Description

The Passive Anti-Theft System (PATS) transceiver reads the PATS key when the key is turned to the START or ON position. The OBDII code sets when there has been a PATS transceiver antenna failure. The PATS transceiver may need to be replaced.

OBDII Code B2103 - Antenna Not Connected - AutoCodes.com — B2103 Code - Antenna Not Connected

What does this mean?

What are the Possible Causes of the DTC B2103?

Faulty Passive Anti-Theft System (PATS) Transceiver Antenna
Disconnected Passive Anti-Theft System (PATS) Transceiver
Faulty Passive Anti-Theft System (PATS) Transceiver
Passive Anti-Theft System (PATS) Transceiver harness is open or shorted
Passive Anti-Theft System (PATS) Transceiver circuit poor electrical connection

How to Fix the DTC B2103?

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 B2103 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 B2103 code?

Need more information on how to fix the B2103 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B2103 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

B2103 Buick — Power Seat Switch Shorted
B2103 Cadillac — Power Seat Switch Shorted
B2103 Chevrolet — Power Seat Switch Shorted
B2103 Ford — Antenna Not Connected
B2103 GMC — Power Seat Switch Shorted
B2103 Lincoln — Antenna Not Connected
B2103 Mercury — Antenna Not Connected

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 B2103 Code

1. What are the common symptoms of OBDII code B2103 (Antenna Not Connected)?

- The most common symptoms include loss of radio signal, poor GPS reception, and malfunctioning keyless entry system.

2. What are the possible causes of OBDII code B2103 (Antenna Not Connected)?

- The code may be triggered by a faulty antenna, damaged antenna wiring, loose connections, or a malfunctioning antenna module.

3. How can I diagnose the issue causing OBDII code B2103 (Antenna Not Connected)?

- A thorough visual inspection of the antenna and its wiring is recommended. Checking for loose connections and testing the antenna module are also essential steps.

4. Can I repair OBDII code B2103 (Antenna Not Connected) on my own?

- If you have experience with automotive electrical systems, you may attempt to repair the issue by checking connections and replacing faulty components. Otherwise, seeking professional help is advised.

5. Is it safe to continue driving with OBDII code B2103 (Antenna Not Connected) unresolved?

- While the code itself may not affect the drivability of the vehicle, it is essential to address the underlying issue to ensure proper functioning of communication systems relying on the antenna.

6. Does fixing OBDII code B2103 (Antenna Not Connected) require specialized tools?

- Basic tools such as a multimeter, wiring diagram, and diagnostic scanner may be necessary to diagnose and repair the issue causing the code.

7. What are the potential risks of ignoring OBDII code B2103 (Antenna Not Connected)?

- Ignoring the code may lead to continued loss of signal reception, rendering features like the radio, GPS, and keyless entry system inoperable.

8. How long does it typically take to repair OBDII code B2103 (Antenna Not Connected)?

- The repair time can vary depending on the exact cause of the issue. Simple fixes like reconnecting loose wires may take a short time, while replacing a faulty antenna module could be more time-consuming.

9. Are there any preventive measures to avoid OBDII code B2103 (Antenna Not Connected) in the future?

- Regularly inspecting the antenna and its wiring for damage, ensuring proper connections, and addressing any issues promptly can help prevent the recurrence of this code.

10. Can extreme weather conditions affect OBDII code B2103 (Antenna Not Connected)?

- Yes, exposure to extreme weather conditions such as heavy rain, snow, or extreme heat can potentially damage the antenna or its wiring, leading to the triggering of this code.