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B0637

B0637: Exterior Lighting Malfunction

Fix Cost

$50 - $200

Parts & Labor

Difficulty

3/5

Moderate

1-2 hours

DIY Possible?

✅ Yes

Save money

📖 What Does B0637 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 the dashboard
• difficulty seeing at night

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Common Causes

• Faulty headlight or taillight bulb
• wiring issue
• faulty headlight or taillight switch
• blown fuse

Fix Guide

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Possible Solutions

1. Check and replace the faulty bulb(s), 2. Inspect and repair wiring damage, 3. Replace the headlight or taillight switch, 4. Check and replace the blown fuse

❓ Common Questions About B0637

Can I drive with code B0637?

You can drive for a short time, but should address code B0637 soon to avoid worsening the problem or failing an emissions test.

How much does it cost to fix code B0637?

The estimated repair cost for code B0637 is between $50 and $200. This includes parts and labor. Prices may vary based on your vehicle's make and model.

Is code B0637 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 screwdrivers wrench torx driver test light

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Need a Pro?

Complex codes like B0637 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 B0637

B0635 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