AutoCodes – Acura – B2039 Acura

B2039 Acura 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 Acura 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 670

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

What does this mean?

What are the Possible Causes of the DTC B2039 Acura?

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 Acura?

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 Acura 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 B2039 Acura Code

1. What does OBDII code B2039 mean on an Acura?

Code B2039 indicates a Left Power Sliding Door Switch Open/Close Signal Input Error, meaning the system has detected an issue with the signal from the left sliding door switch.

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

Symptoms include the left sliding door not opening or closing properly, unresponsive door switch controls, or intermittent operation of the sliding door.

3. What causes the B2039 code to appear on an Acura?

Possible causes include a faulty sliding door switch, damaged wiring or connectors, a malfunctioning door motor, or a problem with the Power Sliding Door Control Unit.

4. Can I still drive my Acura with the B2039 code present?

Yes, the code does not affect drivability, but the left power sliding door may not function correctly, which can be inconvenient.

5. How can I diagnose the B2039 code on my Acura?

Start by checking the sliding door switch and its wiring for damage. Use a multimeter to test for proper voltage and continuity. If no issues are found, inspect the control unit or motor.

6. Can a weak battery cause the B2039 code?

While unlikely, a weak battery or low voltage can occasionally cause communication errors within the system. Ensure your battery is fully charged before diagnosing further.

7. How do I fix the B2039 code on my Acura?

Repairs may include replacing the sliding door switch, repairing damaged wiring, cleaning corroded connectors, or replacing the Power Sliding Door Control Unit if necessary.

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

The cost can vary depending on the issue, ranging from $50 for minor wiring repairs to $500 or more if the sliding door motor or control unit needs replacement.

9. Can I reset the B2039 code without fixing the problem?

You can clear the code with an OBDII scanner, but it will likely return if the underlying issue is not resolved.

10. Is the B2039 code specific to Acura vehicles?

While the code format is standard across makes and models, the specific meaning and affected systems depend on the vehicle manufacturer. For Acura, it pertains to the left power sliding door.