← Back to Search Severity: Medium

B0238

B0238: Immobilizer System Malfunction

Fix Cost

$50 - $200

Parts & Labor

Difficulty

3/5

Moderate

1-2 hours

DIY Possible?

✅ Yes

Save money

📖 What Does B0238 Mean?

The immobilizer system has detected a malfunction, preventing the engine from starting. This code is typically set when the key fob battery is weak or the immobilizer system is faulty.

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Symptoms

• Engine won't start
• dashboard warning light is illuminated

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Common Causes

• Weak or dead key fob battery
• faulty immobilizer system
• incorrect key fob programming

Fix Guide

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Possible Solutions

Replace key fob battery, reprogram key fob, replace immobilizer system module

❓ Common Questions About B0238

Can I drive with code B0238?

You can drive for a short time, but should address code B0238 soon to avoid worsening the problem or failing an emissions test.

How much does it cost to fix code B0238?

The estimated repair cost for code B0238 is between $50 and $200. This includes parts and labor. Prices may vary based on your vehicle's make and model.

Is code B0238 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 Immobilizer system tester

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Need a Pro?

Complex codes like B0238 can be tricky. Don't risk it if you're unsure.

Quick Stats

Severity Medium

DIY Friendly Yes

Est. Time 1-2 hours

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Related Diagnostic Codes

Other codes that may appear with B0238

B0236 Sequential Code

💡 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