← Back to Search Severity: High

B0640

B0640: Airbag System Fault

Fix Cost
$500 - $1500
Parts & Labor
Difficulty
4/5
Hard
2-4 hours
DIY Possible?
❌ No
Pro recommended
Category
Body
System

📖 What Does B0640 Mean?

The airbag system has detected a fault, which may be due to a faulty sensor, wiring issue, or malfunctioning airbag module.
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Symptoms

  • Airbag warning light on dashboard
  • airbag may not deploy in a crash
  • or airbag may deploy unexpectedly
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Common Causes

  • Faulty airbag sensor
  • wiring issue
  • malfunctioning airbag module
  • or faulty crash sensor
Fix Guide
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Possible Solutions

1. Check airbag sensor and wiring for damage or corrosion. Replace if necessary. 2. Update airbag module software if necessary. 3. Check crash sensor for proper installation and calibration. 4. Replace airbag module if necessary.

Common Questions About B0640

Can I drive with code B0640?

No, it is not recommended. Seeing code B0640 indicates a serious issue that could damage your engine or transmission if ignored. You should stop driving and have it inspected immediately.

How much does it cost to fix code B0640?

The estimated repair cost for code B0640 is between $500 and $1500. This includes parts and labor. Prices may vary based on your vehicle's make and model.

Is code B0640 easy to fix myself?

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

Required Parts

Tools

Multimeter Scan tool Wrench set Torx screwdriver
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Need a Pro?

Complex codes like B0640 can be tricky. Don't risk it if you're unsure.

Quick Stats

Severity High
DIY Friendly No
Est. Time 2-4 hours
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Related Diagnostic Codes

Other codes that may appear with B0640

💡 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