← View Generic B3774 Guide
Severity: Medium
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Vehicle-Specific Guide
This guide is customized for your 2021 Honda PASSPORT
B3774: B3774: Body System Security Malfunction
on 2021 Honda PASSPORT
Fix Cost
$200 - $500
Parts & Labor
Difficulty
3/5
1-2 hours
DIY Possible?
❌ No
Pro recommended
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 B3774 Mean on 2021 Honda PASSPORT?
The body control module (BCM) has detected a security malfunction, possibly due to a faulty sensor or wiring issue.
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Symptoms
- • Alarm system malfunction
- • doors or trunk won't unlock
- • or immobilizer system failure
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Common Causes
- • Faulty BCM
- • faulty sensor
- • wiring issue
- • or security system malfunction
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How to Fix B3774 on 2021 Honda PASSPORT
1. Check BCM and sensor connections for damage or corrosion. 2. Clear code and test system. 3. Replace BCM or sensor if faulty.
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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 B3774
B3772
Sequential Code
B3772: Seat Position Sensor Circuit Malfunction
Medium
B3773
Sequential Code
B3773: Exterior Lighting Malfunction
Medium
B3775
Sequential Code
B3775: Audio System Malfunction
Medium
B3776
Sequential Code
B3776: Airbag System Fault
High
💡 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