← View Generic B3429 Guide
Severity: Medium
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Vehicle-Specific Guide
This guide is customized for your 2021 Honda PASSPORT
B3429: B3429: 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 B3429 Mean on 2021 Honda PASSPORT?
The B3429 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 B3429 on 2021 Honda PASSPORT
Replace the faulty bulb(s), inspect and repair or replace wiring as needed, and 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 B3429
B3427
Sequential Code
B3427: Power Window Motor Fault
Medium
B3428
Sequential Code
B3428: Seat Position Sensor Malfunction
Medium
B3430
Sequential Code
B3430: Body System Security Malfunction
Medium
B3431
Sequential Code
B3431: Audio System Fault
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