AutoCodes – Generic – B2039

B2039 Code - Left Power Sliding Door Switch Open/Close Signal Input Error

Quick Answer

The Power Sliding Door Control Unit receives inputs from the switches and sensors in the sliding door system and from B-CAN. Common causes include Faulty Left Power Sliding Door Switch, Left Power Sliding Door Switch harness is open or shorted, Left Power Sliding Door 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: B2039 indicates Left Power Sliding Door Switch Open/Close Signal Input Error.
Common causes: Common causes include Faulty Left Power Sliding Door Switch, Left Power Sliding Door Switch harness is open or shorted, Left Power Sliding Door 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 665

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 06, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B2039 Description

The Power Sliding Door Control Unit receives inputs from the switches and sensors in the sliding door system and from B-CAN. It outputs to the slide motor, release actuator, and closer motor to control the movement of the doors. It also controls the sliding door beeper and indicator. There is one rocker switch for each door. Each switch signals its respective power sliding door control unit that the driver wants to open or close that door. The OBDII code sets when the Left Power Sliding Door Control Unit detects a Left Power Sliding Door Switch Open/Close Signal Input Error.

OBDII Code B2039 - Left Power Sliding Door Switch Open/Close Signal Input Error - AutoCodes.com — B2039 Code - Left Power Sliding Door Switch Open/Close Signal Input Error

What does this mean?

What are the Possible Causes of the DTC B2039?

Faulty Left Power Sliding Door Switch
Left Power Sliding Door Switch harness is open or shorted
Left Power Sliding Door Switch circuit poor electrical connection
Faulty Left Power Sliding Door Control Unit

How to Fix the DTC B2039?

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 B2039 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 B2039 code?

Need more information on how to fix the B2039 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B2039 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

B2039 Acura — Left Power Sliding Door Switch Open/Close Signal Input Error
B2039 Honda — Left Power Sliding Door Switch Open/Close Signal Input Error

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 B2039 Code

1. What does the OBDII code B2039 mean?

The B2039 code indicates an issue with the Left Power Sliding Door Switch Open/Close signal, where the system detects an error in the signal input.

2. What are the common symptoms of the B2039 code?

Symptoms include the left power sliding door not responding to open/close commands, intermittent door operation, or the door being stuck in one position.

3. What causes the B2039 code to appear?

Common causes include a faulty left power sliding door switch, damaged wiring or connectors, or a malfunction in the power sliding door control module.

4. How is the B2039 code diagnosed?

Diagnosis involves using a scan tool to confirm the code, inspecting wiring and connectors for damage, and testing the functionality of the left power sliding door switch and related components.

5. Can I still drive my vehicle with the B2039 code active?

Yes, the vehicle is safe to drive, but the left power sliding door may not function properly, which could be inconvenient or pose a safety risk if access to the rear cabin is needed.

6. How do I fix the B2039 code?

Repairs may include replacing the left power sliding door switch, repairing damaged wiring or connectors, or reprogramming or replacing the power sliding door control module.

7. How much does it cost to fix the B2039 code?

The cost varies depending on the exact issue but can range from $50 to $200 for a switch replacement and up to $500 or more if a control module needs replacement.

8. Can the B2039 code clear itself?

The code may clear temporarily if the issue is intermittent, but it will likely reappear until the underlying problem is resolved.

9. What tools are needed to troubleshoot the B2039 code?

A diagnostic scan tool, a multimeter, and basic automotive tools are typically required to diagnose and repair this code.

10. Can a dealership fix the B2039 code faster than a general mechanic?

A dealership may have specialized knowledge and tools for your specific make and model, potentially making the repair process faster, but a qualified mechanic can also resolve the issue.