← Back to Search Severity: Medium

B0685

B0685: Body System Code for Malfunctioning Exterior Lighting

Fix Cost

$50 - $200

Parts & Labor

Difficulty

3/5

Moderate

1-2 hours

DIY Possible?

✅ Yes

Save money

📖 What Does B0685 Mean?

This code indicates a problem with the exterior lighting system, such as faulty headlight, taillight, or brake light operation.

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Symptoms

• Dim or non-functioning 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

1. Check and replace faulty bulbs; 2. Inspect wiring and connections; 3. Check fuse box for blown fuses; 4. Test lighting control module

❓ Common Questions About B0685

Can I drive with code B0685?

You can drive for a short time, but should address code B0685 soon to avoid worsening the problem or failing an emissions test.

How much does it cost to fix code B0685?

The estimated repair cost for code B0685 is between $50 and $200. This includes parts and labor. Prices may vary based on your vehicle's make and model.

Is code B0685 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 B0685 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 B0685

B0683 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