← View Generic B0390 Guide
Severity: Medium
🚗
Vehicle-Specific Guide
This guide is customized for your 2021 Honda PASSPORT
B0390: B0390: Body Control Module (BCM) Security Fault
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
⚠️
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 B0390 Mean on 2021 Honda PASSPORT?
The Body Control Module (BCM) has detected a security fault, which may be caused by a faulty sensor, wiring issue, or software problem.
⚠️
Symptoms
- • Alarm system malfunction
- • door locks not functioning
- • or immobilizer system failure
🔍
Common Causes
- • Faulty sensor
- • wiring issue
- • software problem
- • or BCM failure
🛠️
How to Fix B0390 on 2021 Honda PASSPORT
1. Check and clear any trouble codes. 2. Inspect and repair or replace faulty sensors. 3. Check and repair or replace wiring. 4. Update software if necessary. 5. Replace BCM if faulty.
🔧
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
🔗
Related Diagnostic Codes
Other codes that may appear with B0390
B0388
Sequential Code
B0388: Seat Position Sensor Circuit Malfunction
Medium
B0389
Sequential Code
B0389: Exterior Lighting Malfunction
Medium
B0391
Sequential Code
B0391: Audio System Malfunction
Medium
B0392
Sequential Code
B0392: Airbag System Sensor Circuit Malfunction
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