AutoCodes – Generic – B2805

B2805 Code - No transmitters Programmed

Quick Answer

When a receiver is replaced, all transmitters must be programmed to a new electronic door lock receiver. Common causes include Program transmitters, Faulty Remote control door lock receiver, Remote control door lock receiver harness is open or shorted. 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: B2805 indicates No transmitters Programmed.
Common causes: Common causes include Program transmitters, Faulty Remote control door lock receiver, Remote control door lock receiver harness is open or shorted.
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 1,264

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 Feb 11, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B2805 Description

When a receiver is replaced, all transmitters must be programmed to a new electronic door lock receiver. DTC will remain current until at least one transmitter is programmed. Up to 3 identification codes can be stored by the receiver.
The Diagnostic Trouble Code (DTC) B2805 will set and store in receiver memory when the electronic door lock receiver indicates no transmitter Vehicle Access Code (VAC) has been programmed. No driver warning message will be displayed for this DTC.
The DTC B2805 will automatically clear when the electronic door lock receiver has indicated a valid VAC was programmed properly.

OBDII Code B2805 - No transmitters Programmed - AutoCodes.com — B2805 Code - No transmitters Programmed

What does this mean?

What are the Possible Causes of the DTC B2805?

Program transmitters
Faulty Remote control door lock receiver
Remote control door lock receiver harness is open or shorted
Remote control door lock receiver circuit poor electrical connection

How to Fix the DTC B2805?

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 B2805 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 B2805 code?

Need more information on how to fix the B2805 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B2805 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

B2805 Buick — No transmitters Programmed
B2805 Cadillac — No transmitters Programmed
B2805 Chevrolet — No transmitters Programmed
B2805 GMC — No transmitters Programmed

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 B2805 Code

1. What are the common symptoms of OBDII code B2805 (No transmitters Programmed)?

- The common symptoms include difficulty starting the vehicle, issues with remote keyless entry, and warning lights on the dashboard.

2. What typically causes the OBDII code B2805 to appear?

- This code usually appears when the vehicle's security system fails to detect any programmed transmitters, such as key fobs or remote entry devices.

3. How can I diagnose the cause of OBDII code B2805?

- To diagnose the issue, you can start by checking the battery in the key fob, ensuring the transmitter is in good working condition, and verifying the vehicle's security system settings.

4. Can a low car battery trigger the OBDII code B2805?

- Yes, a low car battery can sometimes trigger this code, as the security system may not have enough power to detect the programmed transmitters.

5. What are some potential repair tips for resolving OBDII code B2805?

- Some repair tips include replacing the battery in the key fob, reprogramming the transmitters, checking the security system wiring, and resetting the vehicle's computer.

6. Is it possible to reset OBDII code B2805 without professional help?

- In some cases, you may be able to reset the code by disconnecting the car battery for a few minutes and then reconnecting it, but it's recommended to address the underlying issue for a permanent fix.

7. Can a faulty key fob cause OBDII code B2805 to reappear after resetting?

- Yes, if the key fob is faulty or not transmitting properly, it can cause the code to reappear even after resetting it. In such cases, replacing or repairing the key fob may be necessary.

8. How important is it to address OBDII code B2805 promptly?

- It is important to address this code promptly to ensure the proper functioning of the vehicle's security system and avoid potential issues with starting the vehicle or using remote keyless entry.

9. Are there any DIY solutions for fixing OBDII code B2805?

- While some DIY solutions like checking the key fob battery or reprogramming the transmitters may help, more complex issues with the security system may require professional diagnosis and repair.

10. Can OBDII code B2805 affect the overall performance of the vehicle?

- While the code itself may not directly affect the vehicle's performance, unresolved issues with the security system could lead to inconvenience and potential safety concerns, making it important to address promptly.