AutoCodes – Chevrolet – B3666 Chevrolet

B3666 Chevrolet Code - Rear Tonneau Position Error

Quick Answer

The Folding Top Control (FTC) Module supplies accessory voltage to the folding top cover open limit switch. Common causes include Faulty Folding Top Cover Latch Actuator, Faulty Folding Top Cover Open Limit Switch, Faulty Folding Top Control (FTC) Module. 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: B3666 Chevrolet indicates Rear Tonneau Position Error.
Common causes: Common causes include Faulty Folding Top Cover Latch Actuator, Faulty Folding Top Cover Open Limit Switch, Faulty Folding Top Control (FTC) Module.
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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 1,819

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 Mar 10, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code B3666 Chevrolet Description

The Folding Top Control (FTC) Module supplies accessory voltage to the folding top cover open limit switch. It monitors the signal circuit of this switch to determine the open and closed position of the folding top cover. At the same time the Body Control Module (BCM) supplies battery voltage to the folding top cover latch ajar switch and monitors this circuit to determine if the folding top cover is latched or unlatched. The BCM communicates the status of the folding top cover latch ajar switch via class 2 message to the FTC module. Diagnostic Trouble Code (DTC) B3666 will set as a current DTC, if the FTC module senses that the folding top cover latch is not ajar while the folding top cover open limit switch is active.

OBDII Code B3666 Chevrolet - Rear Tonneau Position Error - AutoCodes.com — B3666 Chevrolet Code - Rear Tonneau Position Error

What does this mean?

What are the Possible Causes of the DTC B3666 Chevrolet?

Faulty Folding Top Cover Latch Actuator
Faulty Folding Top Cover Open Limit Switch
Faulty Folding Top Control (FTC) Module
Faulty Body Control Module (BCM)

How to Fix the DTC B3666 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 B3666 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 B3666 Chevrolet code?

Need more information on how to fix the B3666 Chevrolet code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B3666 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 B3666 Chevrolet Code

1. What are the common symptoms of OBDII code B3666 Chevrolet (Rear Tonneau Position Error)?

- The common symptoms include the rear tonneau cover failing to operate properly, unusual noises during tonneau cover operation, or the tonneau cover getting stuck in one position.

2. What are the possible causes of the B3666 Chevrolet error code?

- The error code B3666 can be caused by issues such as a faulty tonneau cover motor, damaged wiring connections, a defective tonneau cover switch, or a malfunctioning control module.

3. How can I diagnose the B3666 Rear Tonneau Position Error in a Chevrolet vehicle?

- To diagnose the B3666 error code, it is recommended to perform a visual inspection of the tonneau cover components, check the wiring for any damage, test the tonneau cover motor, and scan the vehicle's onboard computer for specific error codes.

4. Can I repair the B3666 error code on my Chevrolet vehicle myself?

- Depending on the underlying cause of the error code, you may be able to repair it yourself by replacing a faulty tonneau cover motor, fixing wiring connections, or recalibrating the tonneau cover system. However, complex issues may require professional assistance.

5. Is it safe to drive my Chevrolet with the B3666 Rear Tonneau Position Error code?

- It is generally safe to drive your vehicle with the B3666 error code, but you may experience issues related to the tonneau cover's operation. It is advisable to address the problem promptly to avoid potential inconvenience.

6. How can I reset the B3666 error code on my Chevrolet after making repairs?

- After making necessary repairs to address the B3666 error code, you can reset the code by using an OBDII scanner or disconnecting the vehicle's battery for a few minutes. This will clear the error code from the system.

7. Are there any preventive maintenance tips to avoid the B3666 Chevrolet error code?

- To prevent the B3666 error code, you can regularly inspect the tonneau cover components for any signs of wear or damage, ensure proper wiring connections, and follow the manufacturer's maintenance guidelines for the tonneau cover system.

8. Can extreme weather conditions contribute to the B3666 Rear Tonneau Position Error in a Chevrolet?

- Extreme weather conditions such as excessive heat or cold can impact the tonneau cover system's operation and potentially trigger the B3666 error code. It is important to protect the tonneau cover from harsh weather elements.

9. Will fixing the B3666 error code improve the overall functionality of the tonneau cover in my Chevrolet vehicle?

- Yes, addressing the B3666 error code will help restore the proper functionality of the tonneau cover, ensuring smooth operation and reliable performance.

10. How long does it typically take to repair the B3666 Chevrolet error code?

- The time required to repair the B3666 error code can vary depending on the specific cause of the issue and the complexity of the repairs. It may range from a quick fix to a more involved repair process that could take several hours.