← View Generic B0178 Guide Severity: Medium
🚗 Vehicle-Specific Guide

This guide is customized for your 2021 Honda PASSPORT

B0178: B0178: Door Locks Malfunction

on 2021 Honda PASSPORT

Fix Cost
$100 - $500
Parts & Labor
Difficulty
3/5
1-2 hours
DIY Possible?
❌ No
Pro recommended
Your Vehicle
2021 Honda
PASSPORT
⚠️

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 B0178 Mean on 2021 Honda PASSPORT?

The B0178 code indicates a problem with the door lock system, possibly due to a faulty door lock actuator, wiring issue, or a problem with the body control module.
⚠️

Symptoms

  • • Door locks malfunction
  • • may not lock or unlock properly
  • • or may not respond at all.
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Common Causes

  • • Faulty door lock actuator
  • • wiring issue
  • • body control module malfunction
  • • or a problem with the door lock switch.
🛠️

How to Fix B0178 on 2021 Honda PASSPORT

1. Check the door lock actuator for any signs of physical damage or corrosion. Replace if necessary. 2. Inspect the wiring harness for any signs of damage or corrosion. Repair or replace as needed. 3. Check the body control module for any errors or malfunctions. Clear any error codes and retest. 4. If the issue persists, replace the body control module.

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Parts for 2021 Honda PASSPORT

Door lock actuator Shop ↗ Wiring harness Shop ↗ Body control module Shop ↗

Essential Tool

Must Have

OBD2 Scanner

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Related Diagnostic Codes

Other codes that may appear with B0178

B0176 Sequential Code

B0176: Airbag System Malfunction

High
B0177 Sequential Code

B0177: Climate Control System Malfunction

Medium
B0179 Sequential Code

B0179: Power Window Relay Circuit Malfunction

Medium
B0180 Sequential Code

B0180: 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