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B310E Cadillac Code - Keyless Entry Transmitter 7 Battery

Quick Answer

The B310E diagnostic trouble code for Cadillac specifically refers to an issue with the Keyless Entry Transmitter 7 Battery. Common causes include Low battery in the key fob, Dead battery in the key fob, Faulty key fob transmitter. 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
B310E Cadillac indicates Keyless Entry Transmitter 7 Battery.
Common causes
Common causes include Low battery in the key fob, Dead battery in the key fob, Faulty key fob transmitter.
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 Sep 27, 2024
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Code B310E Cadillac Description

The B310E diagnostic trouble code for Cadillac specifically refers to an issue with the Keyless Entry Transmitter 7 Battery. This code indicates that there is a problem with the battery of the key fob or remote transmitter used for keyless entry into the vehicle. The key fob is an essential component for modern vehicles that allows drivers to lock, unlock, and even start their cars remotely. When the battery in the key fob is low or dead, it can lead to a variety of issues with the keyless entry system.

OBDII Code B310E Cadillac - Keyless Entry Transmitter 7 Battery
B310E Cadillac Code - Keyless Entry Transmitter 7 Battery

Common Causes of B310E Cadillac

  1. Low battery in the key fob.
  2. Dead battery in the key fob.
  3. Faulty key fob transmitter.
  4. Electrical issues in the keyless entry system.
  5. Water damage or physical damage to the key fob.

Symptoms of B310E Cadillac

  1. Key fob buttons not responding to commands.
  2. Difficulty in unlocking or locking the vehicle using the keyless entry system.
  3. Vehicle not starting when the key fob is used.
  4. Warning message on the dashboard related to the keyless entry system.

How to Fix B310E Cadillac

  1. Replace the battery in the key fob with a new one.
  2. Check for any visible damage to the key fob and replace if necessary.
  3. Reprogram the key fob to the vehicle's system.
  4. Test the keyless entry system to ensure proper functionality.
  5. If the issue persists, consult a professional automotive technician for further diagnosis and repair.

Cost to Fix B310E Cadillac

The cost of repairing a Keyless Entry Transmitter 7 Battery issue can vary depending on the specific cause of the problem. In general, replacing the battery in the key fob is a relatively inexpensive fix, with batteries typically costing between $5 to $15. If the key fob itself needs to be replaced due to damage or malfunction, the cost can range from $50 to $200, depending on the make and model of the vehicle. Labor costs for reprogramming the key fob and testing the keyless entry system can add an additional $50 to $100 to the total repair bill. It is advisable to consult with a local auto repair shop to get a more accurate estimate based on the specific circumstances of the issue and the vehicle in question.

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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 B310E Cadillac Code

1. What does the OBDII code B310E mean on a Cadillac?

The B310E code indicates an issue with the battery in Keyless Entry Transmitter 7, such as low voltage or failure.

2. What are the common symptoms of the B310E code?

Symptoms may include difficulty unlocking or starting the vehicle, reduced key fob range, or an inoperative key fob.

3. What causes the B310E code to appear?

The most common cause is a dead or weak battery in the keyless entry transmitter, but it could also be due to a damaged transmitter or a communication issue.

4. How can I fix the B310E code on my Cadillac?

Replace the battery in Keyless Entry Transmitter 7. If the issue persists, inspect the transmitter for damage or have it reprogrammed.

5. What type of battery is used in a Cadillac keyless entry transmitter?

Most Cadillac key fobs use a CR2032 or similar coin-cell battery, but check your owner’s manual for the exact type.

6. Can I clear the B310E code without replacing the battery?

Clearing the code without addressing the underlying issue is not recommended, as it will likely reappear until the problem is resolved.

7. How do I know which transmitter is Keyless Entry Transmitter 7?

The number corresponds to the specific key fob assigned to that slot during programming. If unsure, test each key fob or consult a dealership.

8. What tools are needed to replace the key fob battery?

You typically need a small flathead screwdriver to open the key fob case and a replacement battery.

9. Could the B310E code indicate a problem other than a low battery?

Yes, it could also indicate a damaged key fob, a programming error, or interference with the transmitter’s signal.

10. Will a weak transmitter battery affect the push-to-start functionality?

Yes, a weak or dead battery in the key fob can prevent the vehicle’s push-to-start system from recognizing the key.

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