← Back to Search Severity: Medium

B0157

B0157: Exterior Lighting Malfunction

Fix Cost

$50 - $200

Parts & Labor

Difficulty

3/5

Moderate

1-2 hours

DIY Possible?

✅ Yes

Save money

📖 What Does B0157 Mean?

The B0157 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 lighting control module

Fix Guide

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Possible Solutions

1. Check and replace faulty bulbs. 2. Inspect and repair wiring damage. 3. Update the lighting control module software. 4. Test the lighting system to ensure proper function.

❓ Common Questions About B0157

Can I drive with code B0157?

You can drive for a short time, but should address code B0157 soon to avoid worsening the problem or failing an emissions test.

How much does it cost to fix code B0157?

The estimated repair cost for code B0157 is between $50 and $200. This includes parts and labor. Prices may vary based on your vehicle's make and model.

Is code B0157 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 B0157 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 B0157

B0155 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