AutoCodes – Generic – B1443

B1443 Code - Door Handle Switch Circuit Open

Quick Answer

The Body Control Module (BCM) monitors the Door Handle Switch. Common causes include Faulty Door Handle Switch, Door Handle Switch harness is open or shorted, Door Handle 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: B1443 indicates Door Handle Switch Circuit Open.
Common causes: Common causes include Faulty Door Handle Switch, Door Handle Switch harness is open or shorted, Door Handle 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 9,286

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 Apr 09, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B1443 Description

The Body Control Module (BCM) monitors the Door Handle Switch. The BCM sets the OBDII code when the Door Handle Switch is not to factory specifications.

OBDII Code B1443 - Door Handle Switch Circuit Open - AutoCodes.com — B1443 Code - Door Handle Switch Circuit Open

What does this mean?

What are the Possible Causes of the DTC B1443?

Faulty Door Handle Switch
Door Handle Switch harness is open or shorted
Door Handle Switch circuit poor electrical connection
Faulty Body Control Module (BCM)

How to Fix the DTC B1443?

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 B1443 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 B1443 code?

Need more information on how to fix the B1443 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B1443 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

B1443 Lexus — Air Outlet Damper Control Servomotor Circuit
B1443 Scion — Air Outlet Damper Control Servomotor Circuit
B1443 Toyota — Air Outlet Damper Control Servomotor Circuit

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 B1443 Code

1. What does the OBDII code B1443 mean?

Code B1443 indicates an open circuit in the door handle switch, typically meaning the switch isn't sending signals properly to the vehicle's control module.

2. What are the symptoms of code B1443?

Common symptoms include an unresponsive door handle switch, issues with keyless entry or smart access systems, and possible warning lights on the dashboard.

3. What causes code B1443?

This code is usually caused by a faulty door handle switch, damaged wiring, corroded connectors, or a malfunctioning control module.

4. How do I diagnose code B1443?

Start by inspecting the door handle switch and its wiring for signs of damage or corrosion. Use a multimeter to check for continuity in the circuit and test the switch's functionality.

5. Can I drive with code B1443?

Yes, you can still drive with this code, as it doesn't affect the vehicle's drivability. However, features like keyless entry may not work properly.

6. How do I fix code B1443?

Repairs typically involve replacing the faulty door handle switch, repairing damaged wiring, or cleaning corroded connectors in the circuit.

7. How much does it cost to fix code B1443?

The cost depends on the vehicle and the specific issue, but replacing a door handle switch typically costs $50â€“$200, plus labor if done professionally.

8. Can I reset code B1443 without fixing the issue?

Resetting the code without fixing the underlying problem may temporarily clear it, but the code is likely to return as the issue persists.

9. What tools do I need to repair code B1443?

Common tools include a multimeter for testing electrical continuity, a screwdriver for removing panels, and possibly wire repair kits if damaged wiring is found.

10. Does a bad door handle switch affect other systems?

In some vehicles, a faulty door handle switch can impact keyless entry, alarm systems, or smart key functionality, depending on the integration of these systems.