AutoCodes – Buick – B3055 Buick

B3055 Buick Code - No Transponder Modulation or No Transponder

Quick Answer

When a keyless entry transmitter is inserted into the transmitter pocket/slot and the ignition mode switch is pressed, the transponder embedded in the transmitter is energized by the immobilizer antenna exciter coil. Common causes include Faulty Key, Faulty Immobilizer Control Module. 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: B3055 Buick indicates No Transponder Modulation or No Transponder.
Common causes: Common causes include Faulty Key, Faulty Immobilizer Control Module.
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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 8,092

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 Jun 08, 2023

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code B3055 Buick Description

When a keyless entry transmitter is inserted into the transmitter pocket/slot and the ignition mode switch is pressed, the transponder embedded in the transmitter is energized by the immobilizer antenna exciter coil. The transponder transmits a signal to the immobilizer control module. The immobilizer control module translates this signal to a serial data message which is sent to the Body Control Module (BCM). The BCM then compares this value to a value stored in memory. If the value is correct, the BCM will send the prerelease password via the serial data circuit to the Engine Control Module (ECM). If the learned key code does not match or a transponder value is not received, the BCM will send the start disable password to the ECM. The Diagnostic Trouble Code (DTC) will be set when the BCM is unable to measure the ignition key/transmitter transponder value.

OBDII Code B3055 Buick - No Transponder Modulation or No Transponder - AutoCodes.com — B3055 Buick Code - No Transponder Modulation or No Transponder

What does this mean?

What are the Possible Causes of the DTC B3055 Buick?

Faulty Key
Faulty Immobilizer Control Module

How to Fix the DTC B3055 Buick?

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 does this mean?

Code Tech Notes

There is a Factory Service Bulletin for some vehicles with no crank and with the B3055 code: If the vehicle will not crank, remove the key and make sure it is fully extended. Reinsert the ignition key in the extended straight-out position and turn to crank the engine. Note: This condition can set DTC B3055 (No Transponder or Modulation) in history. Clear the B3055 from history and recheck keys that are learned to verify keys are operating correctly.

Buick, Chevrolet, GM Vehicles Factory Service Bulletin OBDII Code B3055

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B3055 Buick 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 B3055 Buick code?

Need more information on how to fix the B3055 Buick code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B3055 Buick code diagnosed by a professional: Find a repair shop in your area

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 B3055 Buick Code

1. What does the OBDII code B3055 mean on a Buick?

B3055 indicates that there is "No Transponder Modulation" or "No Transponder" detected, often pointing to a problem with the vehicle's immobilizer system or the communication between the transponder key and the theft deterrent module.

2. What are the common symptoms of code B3055 in a Buick?

Symptoms include the engine not starting, the security light staying illuminated or blinking, and the vehicle failing to recognize the transponder key.

3. What causes the B3055 code to appear on a Buick?

The code can be caused by a faulty ignition key (transponder), a damaged or unprogrammed key, a malfunctioning theft deterrent module, or wiring and communication issues between the key and the module.

4. Can a dead key fob battery cause the B3055 code?

No, a dead key fob battery typically affects remote functions like locking and unlocking. B3055 is related to the transponder chip inside the key, which does not rely on the fob battery.

5. How do you fix code B3055 on a Buick?

Solutions include reprogramming or replacing the transponder key, checking and repairing the wiring or connections, and replacing the theft deterrent module if necessary.

6. Can B3055 be triggered by using a duplicate or non-programmed key?

Yes, using a key that hasnâ€™t been properly programmed to the vehicleâ€™s immobilizer system can trigger this code.

7. How much does it typically cost to repair code B3055 on a Buick?

Repair costs vary but can range from $100 to $300 depending on whether you need a new key programmed or if more extensive repairs are required, such as module replacement.

8. Can I clear the B3055 code without fixing the problem?

Clearing the code without addressing the underlying issue may temporarily turn off the warning, but the problem will persist, and the code is likely to return.

9. Does the B3055 code prevent the car from starting?

Yes, in most cases, a B3055 code will prevent the engine from starting because the vehicle cannot verify the key's transponder signal.

10. Do I need a professional to fix the B3055 code on my Buick?

While some issues, like reprogramming a key, can be handled by a locksmith or dealership, diagnosing and repairing wiring or module issues typically requires a professional mechanic with specialized tools.