← View Generic B0304 Guide Severity: High

🚗 Vehicle-Specific Guide

This guide is customized for your 2021 Honda PASSPORT

B0304: B0304: Airbag System Sensor Circuit 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 B0304 Mean on 2021 Honda PASSPORT?

The airbag system sensor circuit is malfunctioning, preventing the airbag from deploying properly in the event of an accident.

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Symptoms

• Airbag warning light on dashboard
• airbag not deploying in a crash
• unusual sounds or vibrations from airbag system

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Common Causes

• Faulty airbag sensor
• wiring damage
• or electrical connector issues

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How to Fix B0304 on 2021 Honda PASSPORT

1. Disconnect battery to prevent accidental deployment. 2. Locate faulty sensor and replace it with a new one. 3. Inspect and repair or replace wiring and electrical connectors as needed. 4. Reconnect battery and test airbag system.

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Need Maintenance Info for Your PASSPORT?

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Parts for 2021 Honda PASSPORT

Airbag sensor Shop ↗ Wiring harness Shop ↗ Electrical connector Shop ↗

Essential Tool

Must Have

OBD2 Scanner

Read & clear codes on your 2021 Honda PASSPORT

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Related Diagnostic Codes

Other codes that may appear with B0304

B0302 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