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B1A12 RAM Code - Remote Keyless Entry Fob 3 Battery Low

Quick Answer

The B1A12 RAM diagnostic trouble code indicates that the remote keyless entry fob 3 battery is low. Common causes include Normal wear and tear on the key fob battery, Exposure to extreme temperatures affecting the battery life, Faulty key fob circuitry leading to excessive battery drain. Severity is Low - monitor the vehicle and repair when practical. The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.

What it means
B1A12 RAM indicates Remote Keyless Entry Fob 3 Battery Low.
Common causes
Common causes include Normal wear and tear on the key fob battery, Exposure to extreme temperatures affecting the battery life, Faulty key fob circuitry leading to excessive battery drain.
Severity
Low - monitor the vehicle and repair when practical.
Can I drive?
The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.
What is this?
Table of contents Created and updated by William Orellana on Sep 17, 2024
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Code B1A12 RAM Description

The B1A12 RAM diagnostic trouble code indicates that the remote keyless entry fob 3 battery is low. This code is typically found in vehicles equipped with keyless entry systems that use a remote key fob to lock and unlock the doors, as well as perform other functions such as opening the trunk or activating the panic alarm. When the battery in the key fob is low, it may not be able to transmit a strong enough signal to the vehicle's receiver, resulting in issues with the keyless entry system.

OBDII Code B1A12 RAM - Remote Keyless Entry Fob 3 Battery Low
B1A12 RAM Code - Remote Keyless Entry Fob 3 Battery Low

Common Causes of B1A12 RAM

  1. Normal wear and tear on the key fob battery.
  2. Exposure to extreme temperatures affecting the battery life.
  3. Faulty key fob circuitry leading to excessive battery drain.
  4. Incorrect handling or dropping of the key fob causing damage to the battery.
  5. Old age of the key fob leading to decreased battery efficiency.

Symptoms of B1A12 RAM

  1. Difficulty locking or unlocking the doors using the key fob.
  2. Inconsistent response from the vehicle to key fob commands.
  3. Inability to open the trunk remotely using the key fob.
  4. Failure of the panic alarm to activate when the key fob button is pressed.

How to Fix B1A12 RAM

  1. Purchase a new battery for the key fob.
  2. Use a small screwdriver to carefully open the key fob and remove the old battery.
  3. Insert the new battery into the key fob, ensuring it is properly positioned.
  4. Close the key fob casing securely.
  5. Test the key fob to ensure that the new battery resolves the issue.

Cost to Fix B1A12 RAM

The cost of replacing the battery in a key fob typically ranges from $5 to $15, depending on the type of battery required for the specific key fob model. Labor costs for this repair are minimal and can often be done by the vehicle owner without the need for professional assistance. However, if assistance is required, labor rates at auto repair shops can vary between $80 and $150 per hour. It's recommended to check with local auto repair shops for more accurate pricing based on the specific vehicle make and model.

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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 B1A12 RAM Code

1. What does the OBDII code B1A12 mean?

Code B1A12 indicates that the battery in the third remote keyless entry (RKE) fob for a RAM vehicle is low.

2. What are the symptoms of the B1A12 code?

Symptoms include a warning message on the vehicle's dashboard, reduced range for the key fob, or the inability to unlock or start the vehicle using the affected fob.

3. What causes the B1A12 code to appear?

The primary cause is a low or depleted battery in the third remote key fob.

4. How can I fix the B1A12 code?

Replace the battery in the affected key fob with a new one, ensuring you use the correct battery type.

5. How do I know which key fob is the third one?

The third key fob is typically listed in the vehicle's system configuration. Refer to your owner’s manual or test each fob to identify the one with a low battery.

6. Will the B1A12 code clear automatically after replacing the battery?

In most cases, the code will clear automatically once the battery is replaced, but you may need to use a scan tool to clear it manually if it persists.

7. What type of battery do I need for the key fob?

Most RAM key fobs use a CR2032 or similar coin cell battery. Check your owner’s manual or the current battery for the exact type.

8. Can I keep using the key fob with a low battery?

While it may work temporarily, a low battery can result in intermittent functionality or complete failure, so it’s best to replace it promptly.

9. Does the B1A12 code affect vehicle performance?

No, this code only pertains to the affected key fob and does not impact the vehicle’s overall performance.

10. Do I need to reprogram the key fob after replacing the battery?

Typically, no reprogramming is needed after replacing the battery, but if the fob doesn't function, consult your owner’s manual or dealer for assistance.

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