← View Generic B0454 Guide Severity: Medium
🚗 Vehicle-Specific Guide

This guide is customized for your 2021 Honda PASSPORT

B0454: B0454: Immobilizer System Malfunction

on 2021 Honda PASSPORT

Fix Cost
$50 - $200
Parts & Labor
Difficulty
3/5
1-2 hours
DIY Possible?
✅ Yes
Save money
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 B0454 Mean on 2021 Honda PASSPORT?

The immobilizer system has malfunctioned, preventing the vehicle from starting or operating. This code is typically set when the immobilizer system detects a problem with the key fob, ignition switch, or other related components.
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Symptoms

  • • Vehicle will not start
  • • may stall or shut off while driving
  • • warning lights on dashboard
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Common Causes

  • • Faulty key fob
  • • ignition switch
  • • immobilizer module
  • • or wiring issues
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How to Fix B0454 on 2021 Honda PASSPORT

1. Check and replace the key fob battery if low. 2. Inspect and clean the ignition switch and surrounding areas. 3. Check for any loose or damaged wiring connections. 4. Scan for any other codes to determine the root cause of the issue.

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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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Parts for 2021 Honda PASSPORT

Key fob battery Shop ↗ Ignition switch Shop ↗ Immobilizer module 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 B0454

B0452 Sequential Code

B0452: Seat Adjuster Switch Circuit Malfunction

Medium
B0453 Sequential Code

B0453: Body System Code for Malfunctioning Headlight or Taillight

Medium
B0455 Sequential Code

B0455: Audio System Fault

Medium
B0456 Sequential Code

B0456: Airbag System - Deployment Sensor Circuit Malfunction

High

💡 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