AutoCodes – Generic – C2106

C2106 Code - Stop Lamp Switch Constant ON Malfunction

Quick Answer

The Anti-Lock Brake System (ABS) Module monitors the Stop Lamp Switch. Common causes include Faulty Stop Lamp Switch, Stop Lamp Switch harness is open or shorted, Stop Lamp 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: C2106 indicates Stop Lamp Switch Constant ON Malfunction.
Common causes: Common causes include Faulty Stop Lamp Switch, Stop Lamp Switch harness is open or shorted, Stop Lamp 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 732

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 Oct 12, 2021

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code C2106 Description

The Anti-Lock Brake System (ABS) Module monitors the Stop Lamp Switch. The ABS Module sets the OBDII code when the Stop Lamp Switch is not to factory specifications.

OBDII Code C2106 - Stop Lamp Switch Constant ON Malfunction - AutoCodes.com — C2106 Code - Stop Lamp Switch Constant ON Malfunction

What does this mean?

What are the Possible Causes of the DTC C2106?

Faulty Stop Lamp Switch
Stop Lamp Switch harness is open or shorted
Stop Lamp Switch circuit poor electrical connection

How to Fix the DTC C2106?

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 C2106 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 C2106 code?

Need more information on how to fix the C2106 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the C2106 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

C2106 Lexus — Stop Lamp Switch Constant ON Malfunction
C2106 Toyota — Stop Lamp Switch Constant ON Malfunction

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 C2106 Code

1. What are the common symptoms of OBDII code C2106 (Stop Lamp Switch Constant ON Malfunction)?

- Common symptoms include the brake lights staying on continuously, difficulty shifting gears, and the inability to engage cruise control.

2. What can cause the OBDII code C2106 to trigger?

- The code C2106 is typically triggered by a faulty stop lamp switch, wiring issues, or a malfunction in the brake light circuit.

3. How can I diagnose the cause of OBDII code C2106?

- To diagnose the cause of code C2106, you can start by checking the stop lamp switch for proper operation, inspecting the wiring for any damage, and testing the brake light circuit for continuity.

4. What are the possible repair options for OBDII code C2106?

- Repair options for code C2106 may include replacing the faulty stop lamp switch, repairing damaged wiring, or addressing any issues in the brake light circuit.

5. Can I continue driving my vehicle with OBDII code C2106 present?

- It is not recommended to drive your vehicle with OBDII code C2106 present, as it can affect the proper operation of your brake lights and other safety systems.

6. How important is it to fix OBDII code C2106 promptly?

- It is important to address OBDII code C2106 promptly to ensure the proper functioning of your brake lights, which are essential for signaling your intentions to other drivers on the road.

7. Is OBDII code C2106 a common issue in vehicles?

- OBDII code C2106 related to the stop lamp switch malfunction is a common issue in vehicles, especially in older models or those with high mileage.

8. Can a DIY enthusiast fix OBDII code C2106 at home?

- Depending on your mechanical skills and tools, a DIY enthusiast may be able to fix OBDII code C2106 at home by following repair guides and using proper diagnostic equipment.

9. Will fixing OBDII code C2106 require a trip to the dealership?

- Fixing OBDII code C2106 may not necessarily require a trip to the dealership, as it can often be addressed by a qualified mechanic or automotive technician at an independent repair shop.

10. How can I prevent OBDII code C2106 from recurring in the future?

- To prevent OBDII code C2106 from recurring, it's important to perform regular maintenance on your vehicle, including checking the stop lamp switch, brake lights, and wiring for any signs of wear or damage.