← View Generic B1504 Guide Severity: High

🚗 Vehicle-Specific Guide

This guide is customized for your 2014 Nissan SENTRA

B1504: B1504: Airbag System Circuit Malfunction

on 2014 Nissan SENTRA

Fix Cost

$200 - $800

Parts & Labor

Difficulty

4/5

1-2 hours

DIY Possible?

❌ No

Pro recommended

Your Vehicle

2014 Nissan

SENTRA

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Important for 2014 Nissan SENTRA Owners

Before starting repairs, verify which engine your 2014 Nissan SENTRA has. Check your VIN or engine code to ensure you order the correct parts.

📖 What Does B1504 Mean on 2014 Nissan SENTRA?

The airbag system circuit has malfunctioned, preventing the airbag from deploying in the event of a crash. This code is often accompanied by other airbag-related codes.

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Symptoms

• Airbag warning light on dashboard
• airbag system not functioning
• crash sensor not triggering

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Common Causes

• Faulty crash sensor
• wiring issue
• airbag module malfunction
• faulty airbag sensor

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How to Fix B1504 on 2014 Nissan SENTRA

1. Check crash sensor and wiring for damage or corrosion. 2. Clear code and test airbag system. 3. Replace faulty crash sensor or wiring. 4. Update airbag module software. 5. Replace airbag module if necessary.

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Need Maintenance Info for Your SENTRA?

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Parts for 2014 Nissan SENTRA

Crash sensor Shop ↗ Wiring harness Shop ↗ Airbag module Shop ↗

Essential Tool

Must Have

OBD2 Scanner

Read & clear codes on your 2014 Nissan SENTRA

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Related Diagnostic Codes

Other codes that may appear with B1504

B1502 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