← View Generic B2978 Guide
Severity: Medium
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Vehicle-Specific Guide
This guide is customized for your 2021 Honda PASSPORT
B2978: B2978: 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 B2978 Mean on 2021 Honda PASSPORT?
The B2978 code indicates a malfunction in the door lock actuator, which may cause issues with door locking and unlocking functions.
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Symptoms
- • Door locks may not function properly
- • or may lock/unlock randomly
- • or may not respond to key fob commands.
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Common Causes
- • Faulty door lock actuator
- • wiring issues
- • or a problem with the door lock module.
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How to Fix B2978 on 2021 Honda PASSPORT
1. Disconnect the battery to reset the system. 2. Check and repair any wiring issues. 3. Replace the door lock actuator if faulty. 4. Update the door lock module software 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.
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Related Diagnostic Codes
Other codes that may appear with B2978
B2976
Sequential Code
B2976: Airbag System Fault
Medium
B2977
Sequential Code
B2977: Climate Control Fan Motor Malfunction
Medium
B2979
Sequential Code
B2979: Power Window Relay Circuit Malfunction
Medium
B2980
Sequential Code
B2980: Seat Position Sensor 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