AutoCodes – Infiniti – B2126 Infiniti

B2126 Infiniti Code - Detention Switch

Quick Answer

Detention switch is installed on Automatic Transmission (AT) device. Common causes include Faulty Detention Switch, Detention Switch harness is open or shorted, Detention Switch circuit poor electrical connection. 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: B2126 Infiniti indicates Detention Switch.
Common causes: Common causes include Faulty Detention Switch, Detention Switch harness is open or shorted, Detention Switch circuit poor electrical connection.
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 6,969

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 19, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B2126 Infiniti Description

Detention switch is installed on Automatic Transmission (AT) device. It is turned OFF when the AT selector lever is in Park (P) position. The driver seat control unit judges that the AT selector lever is in P position if continuity does not exist in this circuit.

OBDII Code B2126 Infiniti - Detention Switch - AutoCodes.com — B2126 Infiniti Code - Detention Switch

What does this mean?

What are the Possible Causes of the DTC B2126 Infiniti?

Faulty Detention Switch
Detention Switch harness is open or shorted
Detention Switch circuit poor electrical connection

How to Fix the DTC B2126 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 B2126 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 B2126 Infiniti Code

1. What is OBDII code B2126 for Infiniti related to the Detention Switch?

The B2126 code in Infiniti vehicles relates to the Detention Switch, which is part of the vehicle's security system.

2. What are common symptoms of OBDII code B2126 in an Infiniti?

Common symptoms of B2126 may include the inability to start the vehicle, the engine not turning over, or the security system triggering and preventing the vehicle from starting.

3. What are possible causes of OBDII code B2126 in an Infiniti?

Possible causes of B2126 include a faulty Detention Switch, issues with the vehicle's security system, or wiring problems related to the switch.

4. How can I diagnose OBDII code B2126 in my Infiniti?

Diagnosing B2126 typically involves using a diagnostic scanner to retrieve the specific fault code, checking the Detention Switch for any visible damage, and inspecting the wiring connections for any signs of wear or corrosion.

5. Can I repair OBDII code B2126 in my Infiniti myself?

Repairing B2126 may be possible for those with mechanical expertise. It usually involves replacing the faulty Detention Switch, addressing any issues with the security system, or repairing/replacing damaged wiring.

6. Are there any DIY tips for fixing OBDII code B2126 in an Infiniti?

DIY tips for fixing B2126 include ensuring all electrical connections are secure, checking for blown fuses related to the security system, and consulting the vehicle's service manual for specific troubleshooting steps.

7. How serious is OBDII code B2126 in an Infiniti?

B2126 can be a serious issue as it can prevent the vehicle from starting or cause the security system to malfunction. It is recommended to address this code promptly to avoid being stranded.

8. Can OBDII code B2126 in an Infiniti cause any other problems?

If not addressed promptly, B2126 can lead to further security system malfunctions, potential starting issues, and may even result in the vehicle being immobilized.

9. Is it safe to drive my Infiniti with OBDII code B2126 present?

It is not recommended to drive your Infiniti with B2126 present, as it may lead to unexpected starting issues or the vehicle being immobilized at an inconvenient time.

10. How much does it typically cost to repair OBDII code B2126 in an Infiniti?

The cost to repair B2126 in an Infiniti can vary depending on the root cause of the issue, but it may range from a simple fix like replacing a fuse to a more complex repair involving the Detention Switch or security system components.