AutoCodes – Generic – B3055

B3055 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 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.

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Code Popularity 9,313

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

What does this mean?

What are the Possible Causes of the DTC B3055?

Faulty Key
Faulty Immobilizer Control Module

How to Fix the DTC B3055?

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

User Submitted Video

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 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 code?

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

Need Help with the Code?

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

Information for Specific Makes

B3055 Buick — No Transponder Modulation or No Transponder
B3055 Cadillac — No Transponder Modulation or No Transponder
B3055 Chevrolet — No Transponder Modulation or No Transponder
B3055 GMC — No Transponder Modulation or No Transponder

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 Code

1. What are the common symptoms of OBDII code B3055?

The common symptoms of OBDII code B3055 include issues with starting the vehicle, the engine not turning over, or the key not being recognized by the vehicle's immobilizer system.

2. What can cause the OBDII code B3055 to trigger?

The OBDII code B3055 can be triggered by a faulty transponder in the key, a problem with the immobilizer system, or issues with the key itself.

3. How can I diagnose the cause of OBDII code B3055?

To diagnose the cause of OBDII code B3055, you can start by checking if other keys work in the vehicle, ensuring the key battery is not dead, and inspecting the key for any physical damage.

4. Can I repair OBDII code B3055 on my own?

Depending on the specific cause, repairing OBDII code B3055 may require reprogramming the key, replacing the transponder, or repairing the immobilizer system. It is recommended to consult a professional automotive technician for a proper diagnosis and repair.

5. Are there any temporary solutions for OBDII code B3055?

If the OBDII code B3055 is triggered due to a faulty key transponder, using a spare key (if available) may provide a temporary solution until the main key is repaired or replaced.

6. How much does it cost to fix OBDII code B3055?

The cost of fixing OBDII code B3055 can vary depending on the specific cause of the issue. It is advisable to get a diagnostic from a qualified mechanic to determine the exact repair cost.

7. Can OBDII code B3055 cause permanent damage to my vehicle?

OBDII code B3055 itself does not cause permanent damage to the vehicle, but it can prevent the vehicle from starting or running properly if left unresolved for an extended period.

8. Is it safe to drive with OBDII code B3055 active?

It is not recommended to drive with OBDII code B3055 active, as it can lead to starting issues or immobilize the vehicle altogether, posing a safety risk on the road.

9. How often does OBDII code B3055 occur in vehicles?

OBDII code B3055, related to issues with transponder modulation or transponder recognition, is not as common as other OBDII codes but can occur in vehicles equipped with immobilizer systems.

10. Can weather conditions affect the triggering of OBDII code B3055?

Extreme weather conditions, such as extreme cold or heat, can potentially impact the functionality of the key transponder or immobilizer system, leading to the triggering of OBDII code B3055.