← View Generic B3621 Guide
Severity: Medium
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Vehicle-Specific Guide
This guide is customized for your 2021 Honda PASSPORT
B3621: B3621: Turn Signal Lamp 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 B3621 Mean on 2021 Honda PASSPORT?
The B3621 code indicates a malfunction in the turn signal lamp circuit, which can cause the turn signals to malfunction or not function at all.
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Symptoms
- • Turn signals not working
- • flashing
- • or staying on continuously
- • warning lights on dashboard
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Common Causes
- • Faulty turn signal lamp
- • wiring issue
- • or body control module problem
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How to Fix B3621 on 2021 Honda PASSPORT
1. Check and replace the turn signal lamp if faulty. 2. Inspect and repair any damaged wiring. 3. Update the body 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.
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Related Diagnostic Codes
Other codes that may appear with B3621
B3619
Sequential Code
B3619: Power Window Relay Circuit Malfunction
Medium
B3620
Sequential Code
B3620: Seat Position Sensor Circuit Malfunction
Medium
B3622
Sequential Code
B3622: Immobilizer System Malfunction
High
B3623
Sequential Code
B3623: 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