← View Generic B1240 Guide
Severity: High
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Vehicle-Specific Guide
This guide is customized for your 2021 Honda PASSPORT
B1240: B1240: Airbag System Malfunction
on 2021 Honda PASSPORT
Fix Cost
$500 - $1500
Parts & Labor
Difficulty
4/5
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 B1240 Mean on 2021 Honda PASSPORT?
The airbag system has detected a malfunction, which may be due to a faulty sensor, wiring issue, or software problem.
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Symptoms
- • Airbag warning light on
- • airbag may not deploy in a crash
- • or airbag may deploy unexpectedly
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Common Causes
- • Faulty airbag sensor
- • wiring issue
- • software problem
- • or faulty airbag module
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How to Fix B1240 on 2021 Honda PASSPORT
1. Check airbag sensor and wiring for damage or corrosion. 2. Update software if necessary. 3. Replace faulty airbag 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 B1240
B1238
Sequential Code
B1238: Immobilizer System Malfunction
Medium
B1239
Sequential Code
B1239: Audio System Fault
Medium
B1241
Sequential Code
B1241: Climate Control Temperature Sensor Malfunction
Medium
B1242
Sequential Code
B1242: Door Locks 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