AutoCodes – Chevrolet – B3935 2017 Chevrolet Silverado

B3935 2017 Chevrolet Silverado Code - Transponder Authentication

Quick Answer

When an ignition key is inserted into the ignition lock cylinder and the ignition is switched ON, the transponder embedded in the key is energized by the exciter coil surrounding the ignition lock cylinder. Common causes include Faulty Key/Transmitter, Faulty Body Control Module (BCM). 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/Transmitter, Faulty Body Control Module (BCM).
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 378

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

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Table of contents Created and updated by William Orellana on Jun 17, 2023

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B3935 2017 Chevrolet Silverado Description

When an ignition key is inserted into the ignition lock cylinder and the ignition is switched ON, the transponder embedded in the key is energized by the exciter coil surrounding the ignition lock cylinder. 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.

OBDII Code B3935 2017 Chevrolet Silverado - Transponder Authentication - AutoCodes.com — B3935 2017 Chevrolet Silverado Code - Transponder Authentication

What does this mean?

What are the Possible Causes of the DTC B3935 2017 Chevrolet Silverado?

Faulty Key/Transmitter
Faulty Body Control Module (BCM)

How to Fix the DTC B3935 2017 Chevrolet Silverado?

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 B3935 2017 Chevrolet Silverado 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 B3935 2017 Chevrolet Silverado code?

Need more information on how to fix the B3935 2017 Chevrolet Silverado code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B3935 2017 Chevrolet Silverado 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 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.