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B0645

B0645: Turn Signal Lamp Malfunction

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

📖 What Does B0645 Mean?

This code indicates a malfunction in the turn signal lamp circuit, which can cause the turn signal lights to malfunction or not function at all.
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Symptoms

  • Turn signal lights not working
  • flashing
  • or staying on continuously
  • or a combination of these symptoms.
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Common Causes

  • Faulty turn signal lamp
  • faulty turn signal switch
  • faulty wiring or connectors
  • or a blown fuse.
Fix Guide
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Possible Solutions

1. Check the turn signal lamp for any signs of damage or wear. Replace if necessary. 2. Check the turn signal switch for any signs of wear or corrosion. Clean or replace if necessary. 3. Check the wiring and connectors for any signs of damage or corrosion. Repair or replace if necessary. 4. Check the fuse box for a blown fuse. Replace the fuse if necessary.

Common Questions About B0645

Can I drive with code B0645?

You can drive for a short time, but should address code B0645 soon to avoid worsening the problem or failing an emissions test.

How much does it cost to fix code B0645?

The estimated repair cost for code B0645 is between $50 and $200. This includes parts and labor. Prices may vary based on your vehicle's make and model.

Is code B0645 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 Pliers
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Need a Pro?

Complex codes like B0645 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 B0645

💡 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