← Back to Search Severity: Medium

B0158

B0158: Immobilizer System Malfunction

Fix Cost
$50 - $200
Parts & Labor
Difficulty
3/5
Moderate
1-2 hours
DIY Possible?
❌ No
Pro recommended
Category
Body
System

📖 What Does B0158 Mean?

The immobilizer system has detected an error, preventing the vehicle from starting. This code indicates a problem with the immobilizer system's communication or authentication process.
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Symptoms

  • Vehicle will not start
  • may display a security warning message on the dashboard
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Common Causes

  • Faulty immobilizer system module
  • incorrect key or fob battery
  • low battery voltage
  • faulty wiring or connections
Fix Guide
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Possible Solutions

1. Check and replace the key or fob battery if necessary. 2. Inspect and clean the immobilizer system module and wiring connections. 3. Replace the immobilizer system module if faulty. 4. Update the immobilizer system software if necessary.

Common Questions About B0158

Can I drive with code B0158?

You can drive for a short time, but should address code B0158 soon to avoid worsening the problem or failing an emissions test.

How much does it cost to fix code B0158?

The estimated repair cost for code B0158 is between $50 and $200. This includes parts and labor. Prices may vary based on your vehicle's make and model.

Is code B0158 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

multimeter wiring tester
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Need a Pro?

Complex codes like B0158 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 B0158

💡 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