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B1A73 Dodge Code - Passive Entry Antenna 3 General Electric Failure

Quick Answer

The B1A73 diagnostic trouble code (DTC) is specific to Dodge vehicles and indicates a failure related to Passive Entry Antenna 3. Common causes include Physical damage to Passive Entry Antenna 3, such as cracks or breaks, Corrosion or poor connections in the wiring harness associated with the antenna, Faulty key fob battery, leading to weak signal transmission. 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
B1A73 Dodge indicates Passive Entry Antenna 3 General Electric Failure.
Common causes
Common causes include Physical damage to Passive Entry Antenna 3, such as cracks or breaks, Corrosion or poor connections in the wiring harness associated with the antenna, Faulty key fob battery, leading to weak signal transmission.
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.
What is this?
Table of contents Created and updated by William Orellana on Oct 18, 2024
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Code B1A73 Dodge Description

The B1A73 diagnostic trouble code (DTC) is specific to Dodge vehicles and indicates a failure related to Passive Entry Antenna 3. This antenna is part of the vehicle's keyless entry system, which allows the driver to unlock and start the vehicle without physically using a key. The antenna is responsible for receiving signals from the key fob, and if it fails, it can disrupt the communication between the fob and the vehicle's electronic control unit (ECU).

OBDII Code B1A73 Dodge - Passive Entry Antenna 3 General Electric Failure
B1A73 Dodge Code - Passive Entry Antenna 3 General Electric Failure

Common Causes of B1A73 Dodge

  1. Physical damage to Passive Entry Antenna 3, such as cracks or breaks.
  2. Corrosion or poor connections in the wiring harness associated with the antenna.
  3. Faulty key fob battery, leading to weak signal transmission.
  4. Malfunctioning body control module (BCM) that fails to process signals correctly.
  5. Environmental factors, such as moisture intrusion, affecting the antenna's performance.

Symptoms of B1A73 Dodge

  1. Inability to unlock the doors using the key fob.
  2. Engine not starting when the key fob is present.
  3. Intermittent functionality of the passive entry system.
  4. Warning lights on the dashboard related to the keyless entry system.
  5. Reduced range of the key fob's signal, requiring closer proximity to the vehicle.

How to Fix B1A73 Dodge

  1. Diagnostic Testing: Begin with a thorough diagnostic scan to confirm the B1A73 code and check for any additional DTCs that may provide insight into related issues.
  2. Visual Inspection: Inspect Passive Entry Antenna 3 and its wiring for any visible damage, corrosion, or loose connections.
  3. Key Fob Check: Test the key fob battery and replace it if necessary, ensuring that the fob is functioning correctly.
  4. Antenna Replacement: If the antenna is found to be defective, replace it with a new unit, ensuring proper installation and securing all connections.
  5. BCM Reprogramming: If the BCM is suspected to be malfunctioning, reprogram or replace it as needed, and clear any stored DTCs to reset the system.

Cost to Fix B1A73 Dodge

The cost to repair a B1A73 code can vary significantly based on the specific issue and the vehicle's model year. On average, the total repair costs can range from $150 to $600. This estimate typically includes parts, such as a new passive entry antenna (which can cost between $50 to $300), and labor costs, which can range from $80 to $150 per hour. It is important to note that labor rates can vary widely based on location, vehicle make and model, and engine type. In metropolitan areas or at dealerships, rates may be higher, while independent shops often offer lower rates. Therefore, it is advisable to check local rates for a more precise estimate before proceeding with repairs.

What does this mean?

Tech Notes for B1A73 Dodge

B1A73-01 PASSIVE ENTRY ANTENNA 3 GENERAL ELECTRICAL FAILURE

B1A73-11 PASSIVE ENTRY ANTENNA 3 CIRCUIT SHORT TO GROUND

B1A73-12 PASSIVE ENTRY ANTENNA 3 CIRCUIT SHORT TO BATTERY

B1A73-13 PASSIVE ENTRY ANTENNA 3 CIRCUIT OPEN

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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 B1A73 Dodge Code

1. What does the OBDII code B1A73 mean on a Dodge vehicle?

The B1A73 code indicates a "Passive Entry Antenna 3 General Electric Failure," meaning there is an issue with the third passive entry antenna or its circuit.

2. What are the symptoms of the B1A73 code in a Dodge?

Symptoms may include the passive entry system not functioning properly, difficulty unlocking or locking the vehicle without using the key fob, or an illuminated warning light on the dashboard.

3. What causes the B1A73 code to appear on a Dodge?

Common causes include a faulty passive entry antenna, damaged wiring or connectors, water intrusion in the antenna area, or a failure in the associated control module.

4. How is the B1A73 code diagnosed?

A technician will use a scan tool to confirm the code, inspect the passive entry antenna and its wiring, check for corrosion or physical damage, and test the electrical continuity of the circuit.

5. Can I still drive my Dodge with the B1A73 code?

Yes, you can drive the vehicle, but the passive entry system may not function correctly, requiring you to use the key fob or key manually to unlock and lock the car.

6. How can I fix the B1A73 code on my Dodge?

Repairs may involve replacing the faulty passive entry antenna, repairing damaged wiring or connectors, or reprogramming the control module if needed.

7. How much does it cost to fix a B1A73 code on a Dodge?

Repair costs vary depending on the issue but typically range from $100 to $300 for parts and labor, depending on whether the antenna or wiring needs replacement.

8. Can a weak key fob battery cause the B1A73 code?

No, a weak key fob battery does not directly cause the B1A73 code, but it can cause similar symptoms, so it's worth checking the battery first.

9. Where is Passive Entry Antenna 3 located on a Dodge?

The exact location of Passive Entry Antenna 3 varies by model but is often found near the rear of the vehicle, such as in the trunk or under the rear bumper.

10. Does the B1A73 code require a software update to fix?

In some cases, a software update to the control module may be necessary if the issue is related to a programming glitch rather than a hardware failure.

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