← 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
🛠️

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.

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

B0100 Same System

B0100: Seat Position Sensor Malfunction

Medium
B0101 Same System

B0101: Body System Code B0101 - Lighting

Medium
B0102 Same System

B0102: Immobilizer System Malfunction

Medium
B0103 Same System

B0103: Audio System Malfunction

Medium
B0104 Same System

B0104: Airbag System Malfunction

High
B0105 Same System

B0105: Climate Control Blower Motor Fault

Medium

💡 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