AutoCodes – Chevrolet – B0996 Chevrolet

B0996 Chevrolet Code - Vehicle Electronic Control Unit VIN Check Error

Quick Answer

After battery power has been restored following a loss of power, the Theft Deterrent Module (TDM) will perform a check on the stored Vehicle Identification Number (VIN). Common causes include Vehicle Identification Number (VIN) Set Up Procedure, Faulty Theft Deterrent Module (TDM), Theft Deterrent Module (TDM) 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: B0996 Chevrolet indicates Vehicle Electronic Control Unit VIN Check Error.
Common causes: Common causes include Vehicle Identification Number (VIN) Set Up Procedure, Faulty Theft Deterrent Module (TDM), Theft Deterrent Module (TDM) 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 4,983

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 Nov 18, 2024

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B0996 Chevrolet Description

After battery power has been restored following a loss of power, the Theft Deterrent Module (TDM) will perform a check on the stored Vehicle Identification Number (VIN). If the VIN is CORRECT, the TDM will run the VIN Timer for a programmable length of time, typically 10 minutes. The TDM will send a message via the serial data circuit to the Instrument Panel Cluster (IPC) to illuminate the SECURITY indicator. After the VIN Timer has timed out, the security indicator will turn OFF. If the VIN is INCORRECT, the TDM will send the fuel disable password to the Engine Control Module (ECM), via the serial data circuit. The immobiliser system considers this to be an indication of tampering and will not allow the vehicle to start. The TDM will send a message via the serial data circuit to the IPC to flash the SECURITY indicator.

OBDII Code B0996 Chevrolet - Vehicle Electronic Control Unit VIN Check Error - AutoCodes.com — B0996 Chevrolet Code - Vehicle Electronic Control Unit VIN Check Error

What does this mean?

What are the Possible Causes of the DTC B0996 Chevrolet?

Vehicle Identification Number (VIN) Set Up Procedure
Faulty Theft Deterrent Module (TDM)
Theft Deterrent Module (TDM) harness is open or shorted
Theft Deterrent Module (TDM) circuit poor electrical connection

How to Fix the DTC B0996 Chevrolet?

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 B0996 Chevrolet 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 B0996 Chevrolet code?

Need more information on how to fix the B0996 Chevrolet code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B0996 Chevrolet 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 B0996 Chevrolet Code

1. What are the common symptoms of OBDII code B0996 in a Chevrolet vehicle?

- Common symptoms include issues with the electronic control unit (ECU), check engine light illumination, and difficulty starting the vehicle.

2. What does the OBDII code B0996 indicate in a Chevrolet car?

- The B0996 code signifies a Vehicle Electronic Control Unit VIN Check Error, related to a problem with the ECU's VIN verification process.

3. What are the possible causes of the B0996 code in a Chevrolet?

- Potential causes include a faulty ECU, wiring issues, damaged connectors, or a mismatch between the VIN stored in the ECU and the vehicle.

4. How can I diagnose the B0996 code in my Chevrolet vehicle?

- Diagnosis typically involves using an OBDII scanner to retrieve the specific code, checking the ECU for VIN mismatch, and inspecting related wiring and connectors.

5. Can I continue driving my Chevrolet with the B0996 code present?

- It is not recommended to drive the vehicle with an unresolved B0996 code, as it may lead to performance issues or potential safety hazards.

6. How can I repair the B0996 code in my Chevrolet?

- Repair methods may include reprogramming the ECU with the correct VIN, repairing damaged wiring or connectors, or replacing the ECU if necessary.

7. Will resetting the B0996 code make it go away permanently?

- Simply resetting the code may temporarily clear the error, but it is crucial to address the underlying issue causing the B0996 code to prevent it from reoccurring.

8. Can a DIY enthusiast fix the B0996 code issue in a Chevrolet?

- Depending on the root cause, DIY enthusiasts with adequate knowledge and tools may be able to address the B0996 code, but complex ECU-related issues may require professional assistance.

9. How long does it typically take to repair the B0996 code in a Chevrolet?

- The repair time can vary based on the specific cause of the code, ranging from a quick reprogramming of the ECU to more extensive troubleshooting and repairs that may take several hours.

10. Is it necessary to visit a dealership for the B0996 code repair in a Chevrolet?

- While dealerships have the expertise and tools to address the B0996 code, independent repair shops with experience in automotive electronics may also effectively diagnose and repair the issue.