← View Generic B3709 Guide
Severity: Medium
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Vehicle-Specific Guide
This guide is customized for your 2021 Honda PASSPORT
B3709: B3709: 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 B3709 Mean on 2021 Honda PASSPORT?
This code indicates a problem with the exterior lighting system, such as faulty headlights, taillights, or turn signals.
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Symptoms
- • Dim or inoperative exterior lights
- • warning lights on dashboard
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Common Causes
- • Faulty headlight or taillight bulbs
- • wiring issues
- • or a malfunctioning lighting control module
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How to Fix B3709 on 2021 Honda PASSPORT
1. Check and replace faulty bulbs. 2. Inspect and repair wiring issues. 3. Update or replace the lighting control module 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.
View 2021 Honda PASSPORT SpecsParts for 2021 Honda PASSPORT
Essential Tool
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Related Diagnostic Codes
Other codes that may appear with B3709
B3707
Sequential Code
B3707: Power Window Regulator Malfunction
Medium
B3708
Sequential Code
B3708: Seat Position Sensor Circuit Malfunction
Medium
B3710
Sequential Code
B3710: Immobilizer System Malfunction
High
B3711
Sequential Code
B3711: 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