← View Generic B3509 Guide
Severity: Medium
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Vehicle-Specific Guide
This guide is customized for your 2021 Honda PASSPORT
B3509: B3509: 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 B3509 Mean on 2021 Honda PASSPORT?
The B3509 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 body control module.
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How to Fix B3509 on 2021 Honda PASSPORT
1. Check and replace faulty bulbs. 2. Inspect and repair or replace wiring as needed. 3. Update the body 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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Essential Tool
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Related Diagnostic Codes
Other codes that may appear with B3509
B3507
Sequential Code
B3507: Power Window Relay Circuit Malfunction
Medium
B3508
Sequential Code
B3508: Seat Position Sensor Circuit Malfunction
Medium
B3510
Sequential Code
B3510: Body System Security Malfunction
Medium
B3511
Sequential Code
B3511: 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