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B3935 2017 Chevrolet Silverado Code - Transponder Authentication

Quick Answer

The B3935 diagnostic trouble code (DTC) on a 2017 Chevrolet Silverado indicates a problem with the transponder authentication system. Common causes include Faulty key fob battery, Damaged key fob circuit, Issues with the immobilizer system. 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
B3935 2017 Chevrolet Silverado indicates Transponder Authentication.
Common causes
Common causes include Faulty key fob battery, Damaged key fob circuit, Issues with the immobilizer system.
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 11, 2024
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Code B3935 2017 Chevrolet Silverado Description

The B3935 diagnostic trouble code (DTC) on a 2017 Chevrolet Silverado indicates a problem with the transponder authentication system. This system is responsible for ensuring that the vehicle recognizes and accepts the correct key fob to start the engine. When this code is triggered, it means that there is an issue with the communication between the key fob and the vehicle's immobilizer system.

OBDII Code B3935 2017 Chevrolet Silverado - Transponder Authentication
B3935 2017 Chevrolet Silverado Code - Transponder Authentication

Common Causes of B3935 2017 Chevrolet Silverado

  1. Faulty key fob battery
  2. Damaged key fob circuit
  3. Issues with the immobilizer system
  4. Wiring or connection problems between the key fob and immobilizer
  5. ECM software malfunction

Symptoms of B3935 2017 Chevrolet Silverado

  1. Engine cranks but does not start
  2. "Key Fob Not Detected" warning message on the dashboard
  3. Inability to lock or unlock the vehicle using the key fob
  4. Security light blinking on the dashboard

How to Fix B3935 2017 Chevrolet Silverado

  1. Replace key fob battery: Start by replacing the battery in the key fob to eliminate any power-related issues.
  2. Check key fob circuit: Inspect the key fob circuit for any physical damage or corrosion. Replace the key fob if necessary.
  3. Test immobilizer system: Use a diagnostic tool to test the immobilizer system and ensure that it is functioning correctly.
  4. Check wiring and connections: Inspect the wiring and connections between the key fob and immobilizer for any damage or loose connections. Repair or replace as needed.
  5. Update ECM software: If all other components are in working order, consider updating the ECM software to address any software-related issues.

Cost to Fix B3935 2017 Chevrolet Silverado

The typical repair costs for addressing a transponder authentication issue on a 2017 Chevrolet Silverado can vary depending on the specific cause of the problem. On average, you can expect to pay anywhere from $100 to $500 for parts and labor. However, as mentioned earlier, the actual costs can fluctuate based on factors such as location, dealership rates, and the extent of the repair needed. It's advisable to consult with a trusted mechanic or dealership to get a more accurate estimate for your specific situation.

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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 B3935 2017 Chevrolet Silverado Code

1. What does OBDII code B3935 on a 2017 Chevrolet Silverado indicate?

The B3935 code on a 2017 Chevrolet Silverado refers to a Transponder Authentication error.

2. What are the common symptoms of OBDII code B3935 in a 2017 Chevrolet Silverado?

Common symptoms of B3935 may include issues with starting the vehicle, intermittent stalling, or the engine not turning over.

3. What are the possible causes of OBDII code B3935 in a 2017 Chevrolet Silverado?

Potential causes of B3935 could include a faulty transponder key, issues with the ignition switch, a problem with the immobilizer system, or wiring issues.

4. How can I diagnose the OBDII code B3935 on my 2017 Chevrolet Silverado?

Diagnosing B3935 may involve using a diagnostic scanner to retrieve the specific error code, checking the transponder key for proper functioning, and inspecting the ignition system components.

5. Can I fix the OBDII code B3935 on my 2017 Chevrolet Silverado myself?

Repairing B3935 may require specialized knowledge and tools. It's recommended to consult a professional mechanic or dealership for proper diagnosis and repair.

6. Are there any quick tips to troubleshoot OBDII code B3935 on a 2017 Chevrolet Silverado?

Quick tips include ensuring the transponder key is functioning correctly, checking for any loose or damaged wiring, and verifying the immobilizer system is working properly.

7. Is it safe to continue driving with OBDII code B3935 present in a 2017 Chevrolet Silverado?

It's not advisable to drive with unresolved OBDII codes like B3935, as they can potentially lead to further issues or safety concerns. Seek professional assistance to address the problem promptly.

8. How much does it typically cost to repair OBDII code B3935 on a 2017 Chevrolet Silverado?

The cost of repairing B3935 can vary depending on the specific cause of the issue. It's recommended to obtain estimates from reputable repair shops or dealerships.

9. Can extreme weather conditions affect the occurrence of OBDII code B3935 in a 2017 Chevrolet Silverado?

Extreme temperatures or moisture levels can potentially impact the transponder key or immobilizer system, leading to issues like B3935. Ensure proper maintenance and protection of key components.

10. Will disconnecting the battery reset OBDII code B3935 on a 2017 Chevrolet Silverado?

While disconnecting the battery may reset some error codes, it's not a guaranteed solution for B3935. Proper diagnosis and repair of the underlying issue are necessary to clear the code permanently.

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