← View Generic B1126 Guide
Severity: Medium
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Vehicle-Specific Guide
This guide is customized for your 2021 Honda PASSPORT
B1126: B1126: 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 B1126 Mean on 2021 Honda PASSPORT?
The Body Control Module (BCM) has detected a malfunction in the security system, which may be caused by a faulty sensor, wiring issue, or software problem.
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Symptoms
- • Alarm system failure
- • doors and trunk not locking/unlocking
- • remote start not functioning
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Common Causes
- • Faulty BCM sensor
- • wiring damage
- • software glitch
- • faulty door or trunk lock actuator
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How to Fix B1126 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 door/trunk lock actuator if damaged.
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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 B1126
B1124
Sequential Code
B1124: Seat Height Sensor Circuit Malfunction
Medium
B1125
Sequential Code
B1125: Body Control Module (BCM) Malfunction - Lighting
Medium
B1127
Sequential Code
B1127: Audio System Malfunction
Medium
B1128
Sequential Code
B1128: Airbag System Malfunction
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