← Back to Search Severity: Medium

B0781

B0781: Exterior Lighting Malfunction

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

📖 What Does B0781 Mean?

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

Symptoms

  • Dim or inoperative exterior lights
  • faulty turn signals
  • or warning lights on the dashboard.
🔍

Common Causes

  • Faulty headlight or taillight bulb
  • wiring issue
  • or a problem with the lighting control module.
Fix Guide
🛠️

Possible Solutions

1. Check and replace faulty bulbs. 2. Inspect and repair wiring issues. 3. Update the lighting control module software if necessary.

🚗

Fixing this on your car?

Get the exact oil type, fluid capacities, and torque specs for your specific vehicle before you start the repair.

Find My Car's Specs

Common Questions About B0781

Q

Can I drive with code B0781?

A

You can drive for a short time, but should address code B0781 soon to avoid worsening the problem or failing an emissions test.

Q

How much does it cost to fix B0781?

A

The estimated repair cost for code B0781 is between $50 and $200. This includes parts and labor for most makes and models.

Q

Is this code easy to fix myself?

A

This repair is considered moderate. It may require specialized tools or significant disassembly. Professional help is recommended if you aren't an experienced DIYer.

👨‍🔧

Need a Pro?

Complex codes like B0781 can be tricky. Don't risk it if you're unsure.

📋

Recommended Tool

Essential for DIY

Professional OBD2 Scanner

Read & clear codes, view live data, and reset service lights yourself.

View Best Sellers ↗
🔗

Related Diagnostic Codes

Other codes that may appear with B0781

💡 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