← View Generic B3994 Guide
Severity: Medium
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Vehicle-Specific Guide
This guide is customized for your 2021 Honda PASSPORT
B3994: B3994: Door Locks Actuator Malfunction
on 2021 Honda PASSPORT
Fix Cost
$100 - $300
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 B3994 Mean on 2021 Honda PASSPORT?
The B3994 code indicates a malfunction in the door lock actuator, which may cause the doors to malfunction or not lock/unlock properly.
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Symptoms
- • Doors not locking/unlocking
- • clicking sounds when trying to lock/unlock
- • door ajar warning light on
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Common Causes
- • Faulty door lock actuator
- • wiring issues
- • faulty door lock module
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How to Fix B3994 on 2021 Honda PASSPORT
1. Disconnect battery to reset system. 2. Check wiring and connectors for damage or corrosion. 3. Replace faulty door lock actuator or module.
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Need Maintenance Info for Your PASSPORT?
Get oil capacity, filter specs, and torque settings for your specific 2021 Honda PASSPORT.
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Related Diagnostic Codes
Other codes that may appear with B3994
B3992
Sequential Code
B3992: Airbag System Fault
High
B3993
Sequential Code
B3993: Climate Control Fan Motor Fault
Medium
B3995
Sequential Code
B3995: Power Window Regulator Malfunction
Medium
B3996
Sequential Code
B3996: Seat Switch Circuit 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