← Back to Search Severity: Medium

B0389

B0389: Exterior Lighting Malfunction

Fix Cost
$50 - $200
Parts & Labor
Difficulty
3/5
Moderate
1-2 hours
DIY Possible?
✅ Yes
Save money
Category
Body
System

📖 What Does B0389 Mean?

This code indicates a malfunction in the exterior lighting system, such as the headlights, taillights, or turn signals.
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Symptoms

  • Dim or inoperative exterior lights
  • warning lights on the dashboard
  • or erratic lighting behavior.
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Common Causes

  • Faulty headlight or taillight bulbs
  • wiring issues
  • or a malfunctioning body control module.
Fix Guide
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Possible Solutions

1. Check and replace faulty bulbs. 2. Inspect and repair or replace wiring as needed. 3. Update the body control module's software if necessary.

Common Questions About B0389

Can I drive with code B0389?

You can drive for a short time, but should address code B0389 soon to avoid worsening the problem or failing an emissions test.

How much does it cost to fix code B0389?

The estimated repair cost for code B0389 is between $50 and $200. This includes parts and labor. Prices may vary based on your vehicle's make and model.

Is code B0389 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 B0389 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 B0389

💡 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