← Back to Search Severity: Medium

B0166

B0166: Body System Security Malfunction

Fix Cost
$100 - $500
Parts & Labor
Difficulty
3/5
Moderate
1-2 hours
DIY Possible?
❌ No
Pro recommended
Category
Body
System

📖 What Does B0166 Mean?

The B0166 code indicates a security system malfunction in the vehicle's body control module. This can cause issues with door locks, alarm systems, and other security-related functions.
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Symptoms

  • Door locks not functioning
  • alarm system not triggering
  • security lights flashing
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Common Causes

  • Faulty body control module
  • wiring issue
  • security system sensor malfunction
Fix Guide
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Possible Solutions

1. Check the body control module for any signs of physical damage or corrosion. Clean or replace as needed. 2. Inspect wiring harness for any signs of damage or wear. Repair or replace as needed. 3. Test security system sensors to ensure they are functioning properly. Replace if faulty.

Common Questions About B0166

Can I drive with code B0166?

You can drive for a short time, but should address code B0166 soon to avoid worsening the problem or failing an emissions test.

How much does it cost to fix code B0166?

The estimated repair cost for code B0166 is between $100 and $500. This includes parts and labor. Prices may vary based on your vehicle's make and model.

Is code B0166 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.

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Need a Pro?

Complex codes like B0166 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 B0166

💡 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