← View Generic B1390 Guide
Severity: Medium
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Vehicle-Specific Guide
This guide is customized for your 2021 Honda PASSPORT
B1390: B1390: Body Control Module (BCM) Security System Malfunction
on 2021 Honda PASSPORT
Fix Cost
$100 - $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 B1390 Mean on 2021 Honda PASSPORT?
The Body Control Module (BCM) has detected a security system malfunction, which may be caused by a faulty sensor, wiring issue, or software problem.
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Symptoms
- • Alarm sounds
- • doors lock/unlock randomly
- • security light flashes
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Common Causes
- • Faulty BCM sensor
- • wiring issue
- • software glitch
- • faulty security module
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How to Fix B1390 on 2021 Honda PASSPORT
1. Check BCM sensor connections and wiring for damage or corrosion. 2. Update BCM software if necessary. 3. Replace faulty BCM sensor or security 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 B1390
B1388
Sequential Code
B1388: Seat Switch Circuit Malfunction
Medium
B1389
Sequential Code
B1389: Body System Code - Lighting Malfunction
Medium
B1391
Sequential Code
B1391: Audio System Fault
Medium
B1392
Sequential Code
B1392: 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