← Back to Search Severity: Medium

B0406

B0406: Body System Security Malfunction

Fix Cost

$100 - $500

Parts & Labor

Difficulty

3/5

Moderate

1-2 hours

DIY Possible?

❌ No

Pro recommended

📖 What Does B0406 Mean?

The B0406 code indicates a malfunction in the vehicle's security system, which may cause issues with door locks, alarm systems, or other security-related functions.

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Symptoms

• Difficulty locking/unlocking doors
• alarm system malfunctions
• security lights flashing

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Common Causes

• Faulty security module
• wiring issues
• or incorrect security system configuration

Fix Guide

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Possible Solutions

1. Check and clear any trouble codes using a scan tool. 2. Inspect and repair any damaged wiring. 3. Replace the security module if faulty. 4. Verify security system configuration and adjust if necessary.

❓ Common Questions About B0406

Can I drive with code B0406?

You can drive for a short time, but should address code B0406 soon to avoid worsening the problem or failing an emissions test.

How much does it cost to fix code B0406?

The estimated repair cost for code B0406 is between $100 and $500. This includes parts and labor. Prices may vary based on your vehicle's make and model.

Is code B0406 easy to fix myself?

This repair is considered moderate. It may require specialized tools or significant disassembly. If you are not an experienced mechanic, professional help is recommended.

Required Parts

Tools

Scan tool Multimeter Wire tester

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Need a Pro?

Complex codes like B0406 can be tricky. Don't risk it if you're unsure.

Quick Stats

Severity Medium

DIY Friendly No

Est. Time 1-2 hours

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Related Diagnostic Codes

Other codes that may appear with B0406

B0404 Sequential Code

💡 Why These Codes Are Related:

• Similar Issues: Same root cause or component failure
• Related Problems: Often occur together due to system interactions
• Sequential Codes: Progressive failure stages or multiple sensors
• Same System: Components within the same automotive system