← Back to Search Severity: Medium

B0422

B0422: Body Control Module (BCM) Security System Malfunction

Fix Cost

$200 - $500

Parts & Labor

Difficulty

3/5

Moderate

1-2 hours

DIY Possible?

❌ No

Pro recommended

📖 What Does B0422 Mean?

The Body Control Module (BCM) has detected a malfunction in the security system, which may cause the vehicle to be in a locked state or prevent the engine from starting.

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Symptoms

• Car won't start
• doors won't unlock
• alarm sounds continuously

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Common Causes

• Faulty BCM
• bad or loose wiring
• security system sensor malfunction
• battery drain

Fix Guide

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Possible Solutions

1. Check and reset the BCM, 2. Inspect and repair or replace wiring, 3. Replace faulty security system sensor, 4. Check and repair any battery drain issues

❓ Common Questions About B0422

Can I drive with code B0422?

You can drive for a short time, but should address code B0422 soon to avoid worsening the problem or failing an emissions test.

How much does it cost to fix code B0422?

The estimated repair cost for code B0422 is between $200 and $500. This includes parts and labor. Prices may vary based on your vehicle's make and model.

Is code B0422 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 Torx screwdriver

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Need a Pro?

Complex codes like B0422 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 B0422

B0420 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