← Back to Search Severity: Medium

B0477

B0477: Exterior Lighting Malfunction

Fix Cost

$50 - $200

Parts & Labor

Difficulty

3/5

Moderate

1-2 hours

DIY Possible?

✅ Yes

Save money

📖 What Does B0477 Mean?

This code indicates a problem with the exterior lighting system, such as a faulty headlight, taillight, or turn signal.

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Symptoms

• Dim or inoperative exterior lights
• warning lights on dashboard
• difficulty seeing at night

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Common Causes

• Faulty headlight or taillight bulb
• wiring issue
• blown fuse
• or malfunctioning lighting control module

Fix Guide

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Possible Solutions

Replace faulty bulb, inspect and repair wiring, check and replace blown fuse, update lighting control module software

❓ Common Questions About B0477

Can I drive with code B0477?

You can drive for a short time, but should address code B0477 soon to avoid worsening the problem or failing an emissions test.

How much does it cost to fix code B0477?

The estimated repair cost for code B0477 is between $50 and $200. This includes parts and labor. Prices may vary based on your vehicle's make and model.

Is code B0477 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 Torx screwdriver Pliers

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Need a Pro?

Complex codes like B0477 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 B0477

B0475 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