← View Generic B0174 Guide Severity: Medium

🚗 Vehicle-Specific Guide

This guide is customized for your 2021 Honda PASSPORT

B0174: B0174: Body Control Module (BCM) Security System Malfunction

on 2021 Honda PASSPORT

Fix Cost

$200 - $500

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 B0174 Mean on 2021 Honda PASSPORT?

The Body Control Module (BCM) has detected a security system malfunction, which may cause the vehicle to enter a fail-safe mode or prevent certain features from functioning.

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Symptoms

• Engine light on
• security system alarm sounds
• doors and trunk may be locked or unlocked randomly
• some features may be disabled

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Common Causes

• Faulty BCM
• damaged or corroded wiring
• malfunctioning security sensors
• incorrect BCM programming

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How to Fix B0174 on 2021 Honda PASSPORT

1. Check for loose or corroded wiring and clean or replace as needed. 2. Check BCM programming and update if necessary. 3. Replace faulty security sensors. 4. Re-program the BCM if necessary.

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Need Maintenance Info for Your PASSPORT?

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Parts for 2021 Honda PASSPORT

BCM Shop ↗ wiring harness Shop ↗ security sensors Shop ↗

Essential Tool

Must Have

OBD2 Scanner

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Related Diagnostic Codes

Other codes that may appear with B0174

B0172 Sequential Code

💡 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