← View Generic B0781 Guide
Severity: Medium
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Vehicle-Specific Guide
This guide is customized for your 2021 Honda PASSPORT
B0781: B0781: Exterior Lighting Malfunction
on 2021 Honda PASSPORT
Fix Cost
$50 - $200
Parts & Labor
Difficulty
3/5
1-2 hours
DIY Possible?
✅ Yes
Save money
Your Vehicle
2021 Honda
PASSPORT
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Important for 2021 Honda PASSPORT Owners
Before starting repairs, verify which engine your 2021 Honda PASSPORT has. Check your VIN or engine code to ensure you order the correct parts.
📖 What Does B0781 Mean on 2021 Honda PASSPORT?
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
- • faulty turn signals
- • or warning lights on the dashboard.
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Common Causes
- • Faulty headlight or taillight bulb
- • wiring issue
- • or a problem with the lighting control module.
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How to Fix B0781 on 2021 Honda PASSPORT
1. Check and replace faulty bulbs. 2. Inspect and repair wiring issues. 3. Update the lighting control module software if necessary.
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Need Maintenance Info for Your PASSPORT?
Get oil capacity, filter specs, and torque settings for your specific 2021 Honda PASSPORT.
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Related Diagnostic Codes
Other codes that may appear with B0781
B0779
Sequential Code
B0779: Power Window Circuit Malfunction
Medium
B0780
Sequential Code
B0780: Seat Switch Malfunction
Medium
B0782
Sequential Code
B0782: Immobilizer System Malfunction
Medium
B0783
Sequential Code
B0783: Audio System Malfunction
Medium
💡 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