← View Generic B0978 Guide
Severity: Medium
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Vehicle-Specific Guide
This guide is customized for your 2021 Honda PASSPORT
B0978: B0978: Door Locks Actuator Malfunction
on 2021 Honda PASSPORT
Fix Cost
$150 - $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 B0978 Mean on 2021 Honda PASSPORT?
The Body Control Module (BCM) has detected a malfunction in the door lock actuator circuit, preventing proper door lock operation.
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Symptoms
- • Door locks may not function
- • or may function intermittently
- • with symptoms including failure to lock or unlock
- • or erratic door lock behavior.
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Common Causes
- • Faulty door lock actuator
- • faulty wiring
- • or a malfunctioning Body Control Module (BCM).
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How to Fix B0978 on 2021 Honda PASSPORT
1. Disconnect the battery to reset the BCM. 2. Check and repair any damaged wiring. 3. Replace the faulty door lock actuator. 4. Update the BCM 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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Essential Tool
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Related Diagnostic Codes
Other codes that may appear with B0978
B0976
Sequential Code
B0976: Airbag System Fault
Medium
B0977
Sequential Code
B0977: Climate Control Fan Motor Malfunction
Medium
B0979
Sequential Code
B0979: Power Window Motor Circuit Malfunction
Medium
B0980
Sequential Code
B0980: 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