← View Generic B0040 Guide
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Vehicle-Specific Guide
This guide is customized for your 2021 Honda PASSPORT
B0040: B0040: Airbag System Circuit Malfunction
on 2021 Honda PASSPORT
Fix Cost
$500 - $1500
Parts & Labor
Difficulty
4/5
2-3 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 B0040 Mean on 2021 Honda PASSPORT?
The airbag system circuit has malfunctioned, preventing the airbags from deploying properly in the event of a crash.
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Symptoms
- • Airbag warning light illuminated on the dashboard
- • airbag system not functioning as intended
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Common Causes
- • Faulty airbag sensor
- • wiring issue
- • or malfunctioning airbag control module
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How to Fix B0040 on 2021 Honda PASSPORT
1. Check and clear any trouble codes. 2. Inspect and repair or replace faulty wiring. 3. Test and replace faulty airbag sensor. 4. Update or replace airbag control 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 B0040
B0038
Sequential Code
B0038: Body System Security Malfunction
Medium
B0039
Sequential Code
B0039: Audio System Malfunction
Medium
B0041
Sequential Code
B0041: Climate Control System Malfunction
Medium
B0042
Sequential Code
B0042: Door Locks Actuator 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