← View Generic B3451 Guide Severity: Medium
🚗 Vehicle-Specific Guide

This guide is customized for your 2021 Honda PASSPORT

B3451: B3451: Power Window Relay Circuit Malfunction

on 2021 Honda PASSPORT

Fix Cost
$150 - $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 B3451 Mean on 2021 Honda PASSPORT?

The power window relay circuit has malfunctioned, preventing the windows from functioning properly. This code is typically set when the window regulator or motor is faulty.
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Symptoms

  • • Windows do not move
  • • or move slowly
  • • when attempting to open or close
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Common Causes

  • • Faulty power window relay
  • • window regulator
  • • or motor
  • • wiring issues
  • • or a faulty window switch
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How to Fix B3451 on 2021 Honda PASSPORT

1. Check the power window relay and replace if faulty. 2. Inspect and clean the window regulator and motor. 3. Check the wiring and connectors for damage or corrosion. 4. Replace the window regulator or motor if faulty. 5. Test the window switch to ensure it is functioning properly.

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Parts for 2021 Honda PASSPORT

Power window relay Shop ↗ Window regulator Shop ↗ Window motor Shop ↗

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Related Diagnostic Codes

Other codes that may appear with B3451

B3449 Sequential Code

B3449: Climate Control Fan Motor Fault

Medium
B3450 Sequential Code

B3450: Door Locks Malfunction

Medium
B3452 Sequential Code

B3452: Seat Position Sensor Malfunction

Medium
B3453 Sequential Code

B3453: Exterior Lighting 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