AutoCodes – Infiniti – B2191 Infiniti

B2191 Infiniti Code - Difference Of Key

Quick Answer

The ID verification is performed through the Body Control Module (BCM) and the Nissan Anti Theft System (NATS) Intelligent Key when the push-button ignition switch is pressed. Common causes include Intelligent Key registration, Faulty Intelligent Key. 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: B2191 Infiniti indicates Difference Of Key.
Common causes: Common causes include Intelligent Key registration, Faulty Intelligent Key.
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 5,379

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 Sep 26, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B2191 Infiniti Description

The ID verification is performed through the Body Control Module (BCM) and the Nissan Anti Theft System (NATS) Intelligent Key when the push-button ignition switch is pressed. The BCM prohibits the release of steering lock or start of engine when an unregistered ID of the NATS Intelligent Key is used. The OBDII code is set when the ID verification results between BCM and Intelligent Key are negative. The registration is necessary.

OBDII Code B2191 Infiniti - Difference Of Key - AutoCodes.com — B2191 Infiniti Code - Difference Of Key

What does this mean?

What are the Possible Causes of the DTC B2191 Infiniti?

Intelligent Key registration
Faulty Intelligent Key

How to Fix the DTC B2191 Infiniti?

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 B2191 Infiniti 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.

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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 B2191 Infiniti Code

1. What are the common symptoms of OBDII code B2191 in an Infiniti?

The common symptoms of OBDII code B2191 in an Infiniti include issues with key recognition, difficulty starting the vehicle, and a malfunctioning immobilizer system.

2. What are the possible causes of OBDII code B2191 in an Infiniti?

Possible causes of OBDII code B2191 in an Infiniti include a faulty key fob, problems with the key sensor or antenna, issues with the immobilizer system, or a malfunction in the vehicle's electronic control module.

3. How can I diagnose OBDII code B2191 in my Infiniti?

Diagnosing OBDII code B2191 in your Infiniti typically involves using a diagnostic scanner to retrieve the specific fault code, checking the key fob battery, inspecting the key sensor and antenna for damage, and testing the immobilizer system for proper function.

4. Can I repair OBDII code B2191 in my Infiniti myself?

Depending on the cause of the OBDII code B2191, some repairs may be possible to do yourself, such as replacing the key fob battery or reprogramming the key. However, more complex issues may require professional diagnosis and repair.

5. How can I reset OBDII code B2191 in my Infiniti?

You can reset OBDII code B2191 in your Infiniti by using a diagnostic scanner to clear the fault code. However, it is important to address the underlying cause of the code to prevent it from reoccurring.

6. Will OBDII code B2191 prevent my Infiniti from starting?

In some cases, OBDII code B2191 can prevent your Infiniti from starting due to issues with key recognition or the immobilizer system. It is important to address the problem promptly to avoid being stranded.

7. How much does it cost to repair OBDII code B2191 in an Infiniti?

The cost to repair OBDII code B2191 in an Infiniti can vary depending on the underlying cause of the issue. Simple fixes such as replacing a key fob battery may be relatively inexpensive, while more complex repairs could be more costly.

8. Can a locksmith help with OBDII code B2191 in my Infiniti?

Locksmiths with expertise in automotive electronics may be able to assist with diagnosing and repairing OBDII code B2191 in your Infiniti, especially if the issue is related to the key fob or immobilizer system.

9. Is OBDII code B2191 a serious issue in an Infiniti?

OBDII code B2191 in an Infiniti is typically not a serious issue in terms of vehicle safety, but it can be inconvenient if it prevents you from starting your car. Addressing the problem promptly is recommended to avoid further complications.

10. How can I prevent OBDII code B2191 from occurring in my Infiniti?

To prevent OBDII code B2191 in your Infiniti, you can take precautions such as regularly replacing key fob batteries, keeping key fobs away from water or extreme temperatures, and ensuring the immobilizer system is functioning correctly.