← Back to Search Severity: Medium

B0198

B0198: Immobilizer System Malfunction

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

📖 What Does B0198 Mean?

The immobilizer system has detected a malfunction, preventing the engine from starting. This code indicates a problem with the immobilizer system, which is designed to prevent theft by disabling the engine unless the correct key is present.
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Symptoms

  • Engine won't start
  • immobilizer light on dashboard
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Common Causes

  • Faulty immobilizer module
  • incorrect or worn-out key
  • faulty keyless entry system
  • wiring issues
Fix Guide
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Possible Solutions

1. Check the immobilizer module for any signs of physical damage or corrosion. Clean or replace if necessary. 2. Check the keyless entry system for any issues. 3. Try using a spare key or reprogramming the keyless entry system. 4. If the issue persists, replace the immobilizer module.

Common Questions About B0198

Can I drive with code B0198?

You can drive for a short time, but should address code B0198 soon to avoid worsening the problem or failing an emissions test.

How much does it cost to fix code B0198?

The estimated repair cost for code B0198 is between $100 and $500. This includes parts and labor. Prices may vary based on your vehicle's make and model.

Is code B0198 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 wire tester
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Need a Pro?

Complex codes like B0198 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 B0198

💡 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